User's Answer, 3 layers

class Main:
  print(
"""class Main {public static void main(String[] args) {String a="ɗefine";char c=10;String z="pɼint";char d=23;String y="⁸fẇ×ịṛs⁷";String e="";char x=90;String b="⁺°`¬²ịĿ°£Oḋ®ẋṄ¢¦";String w="⁸Ḷ⁸Ŀ~ʋ^ḋ*Ẓ>{S";String i="return";String n=" ";String f="Game";String s="main";String t="def";String k="#";String u="ƈlass";String m="Іt'ѕ Dоnе.";String o="¨";String g="ƊƝƤƬƲȤɓ";
    if (""")
  print(((1 ^ (29 * -54) + 23 & 103) / 3))
  print(">")
  print(302 - 67 + (2 % 590) | 930 - 123 * (-169))
  print(""") {
      System.out.printf("73----T---|---111-T   T46%c      |     /     |   1%c 39-  1      %c    |   0%c/   %c 1       |   1   1%c|    -6      /    1   |%cL115----    |     0  /%c        %c   8     L76%c         3  6%c          2-J",10,10,92,10,92,10,10,10,92,10,10,10);
    } else if (""")
  print((65 % (59 - 20 * 24)) / -193 * 134) 
  print(">")
  print((624 & 13 + 3012) / 23 * 9)
  print(""") {
      System.out.printf("%cm=%cIt's Done%c;print %c$m%c;", 36, 34, 34, 34, 34);
    } else if (""")
  print(12345 * 4 / 910 - 2 * 401)
  print(">")
  print((1 + 3 / 3) % (24 - 36 * 90))
  print(""") {
      System.out.printf("Flexibility speaks for yard%cairport announces all lies%cring a ring a rosie%ccaesars sat bad%csay %cIt's Done.%c%cAmerica is great",10,10,10,10,34,34,10,10);
    } else if (""")
  print((393 / 91 * 56) - 12 * 78 + 192)
  print(">")
  print(67 | -123 + 21 * 34 - 193)
  print(""") {
        System.out.printf("You are done%cSay %cIt's Done.%c(It really is that simple!!)",10,34,34);
    } else if (""")
  print(154 % 91 * 10 + 345 - 2)
  print(">")
  print(89 + -920 | 65 * 2 ^ 12)
  print(""") {
      System.out.printf("4@abƤḞ⁹%dỴ !Ṙȯ/ṣƥA^?rCs>Y|°ỵ4$m(0a+4r  /ZÐæ⁽e)D1ṖÐ,Ḅ Ḃ &ẉ1ɗḌ¢ġʋḞṬŒ$c “¢¤ƲgṖḳ®[⁾»",29,10,90,3,102,11,1234,95,666);
    } else if (""")
  print(10203 / 192 + 182)
  print(">")
  print(12 - 45 * 69 | 3)
  print(""") {
      System.out.println("YoucAnTryTofIguReoUtwHatThislaNgUagEiSButyOUwoNtBeaBleTobEcaUseiamToOpoWeRFulmWahAHaHaAnDhEreIssOmefilLeRteXtCOmmeNTcOmmeNtCommenTpRInTLpAreNcAPeitSiNGLeQsCaPeDonEdoTrpArencoMmEntCoMMentCoMMeNTfOOBaRyAbBaDabbadAbBAdOOcAnyOuFIndoUtTHEsEcREtBUrIEdINtHIsMEaNInGLeSStEXtNOYoUcaNTbEcaUseIhaVetHepOweRofNopUncTUatIoNandilItERaCYoNmySiDEbyeByePPl");
    } else {
      System.out.printf("%s"+e+"ẊD.%1$s",o);
    }
  }
}""")

def main(Main:Main):
  Main=Main

@main
def mian():
  Main=main(Main())

layer 1, Scala (with Dotty), Outputted

class Main {public static void main(String[] args) {String a="ɗefine";char c=10;String z="pɼint";char d=23;String y="⁸fẇ×ịṛs⁷";String e="";char x=90;String b="⁺°`¬²ịĿ°£Oḋ®ẋṄ¢¦";String w="⁸Ḷ⁸Ŀ~ʋ^ḋ*Ẓ>{S";String i="return";String n=" ";String f="Game";String s="main";String t="def";String k="#";String u="ƈlass";String m="Іt'ѕ Dоnе.";String o="¨";String g="ƊƝƤƬƲȤɓ";
    if (32>21757) {
      System.out.printf("73----T---|---111-T   T46%c      |     /     |   1%c 39-  1      %c    |   0%c/   %c 1       |   1   1%c|    -6      /    1   |%cL115----    |     0  /%c        %c   8     L76%c         3  6%c          2-J",10,10,92,10,92,10,10,10,92,10,10,10);
    } else if (0>225) {
      System.out.printf("%cm=%cIt's Done%c;print %c$m%c;", 36, 34, 34, 34, 34);
    } else if (-748>2) {
      System.out.printf("Flexibility speaks for yard%cairport announces all lies%cring a ring a rosie%ccaesars sat bad%csay %cIt's Done.%c%cAmerica is great",10,10,10,10,34,34,10,10);
    } else if (-520>463) {
        System.out.printf("You are done%cSay %cIt's Done.%c(It really is that simple!!)",10,34,34);
    } else if (973>-817) {
      System.out.printf("4@abƤḞ⁹%dỴ !Ṙȯ/ṣƥA^?rCs>Y|°ỵ4$m(0a+4r  /ZÐæ⁽e)D1ṖÐ,Ḅ Ḃ &ẉ1ɗḌ¢ġʋḞṬŒ$c “¢¤ƲgṖḳ®[⁾»",29,10,90,3,102,11,1234,95,666);
    } else if (235>-3093) {
      System.out.println("YoucAnTryTofIguReoUtwHatThislaNgUagEiSButyOUwoNtBeaBleTobEcaUseiamToOpoWeRFulmWahAHaHaAnDhEreIssOmefilLeRteXtCOmmeNTcOmmeNtCommenTpRInTLpAreNcAPeitSiNGLeQsCaPeDonEdoTrpArencoMmEntCoMMentCoMMeNTfOOBaRyAbBaDabbadAbBAdOOcAnyOuFIndoUtTHEsEcREtBUrIEdINtHIsMEaNInGLeSStEXtNOYoUcaNTbEcaUseIhaVetHepOweRofNopUncTUatIoNandilItERaCYoNmySiDEbyeByePPl");
    } else {
      System.out.printf("%s"+e+"ẊD.%1$s",o);
    }
  }
}

Layer 2, Groovy, Outputted

4@abƤḞ⁹29Ỵ !Ṙȯ/ṣƥA^?rCs>Y|°ỵ4Іt'ѕ Dоnе.(0a+4r  /ZÐæ⁽e)D1ṖÐ,Ḅ Ḃ &ẉ1ɗḌ¢ġʋḞṬŒ
 “¢¤ƲgṖḳ®[⁾»

Layer 3, Jelly, Outputted (for real this time)

Іt'ѕ Dоnе.

Aiden4's answer, 3 layers

"D'`;#]8JIY4jEhw5uRQ+rpLo98*Z('D2CAdbx>+<)yxZpunsl2SRngfe+Lhg`_^$EaZ_^]V[TxXQ9UNrLQJOHMLEiCBAF?>=a;@?8=<54X876/4-Q10/o-&Jkj"75*1-"F&%edAbaw|{tyr8vuWVlkj0Qgfejib(`H^]#a`YA]\[TxXWP8TSLQJnHlkE-CHAeED&B;_?>=}|4Xy1U543s+O/o-&Jk)"75*1-"!&}C{c!x>|{zyxqY6Wsrqpi/mleMiha'HG]#a`_^W?[ZYRvPUTMqQJ2NMLKDhBG@?>b%;:?876;:3W10543,P0/on&J*)('&%${z@~w|uts9Zvutmlk1oQPfkd*bg`_%cbaCYX|\U=YXWPtT6RKoOHMFEi,HGF?DC<A:^>~6;4381Uv4-2+*Non&+*#Gh~}|{"75*1-"y?wvuzyr8vXWsl2ponmfN+Lbgfe^c\"75*1-"`Y^WVUySRWVOTMqQPONM/EiCHG@EDCB;_?>=}|49870/.R,1*N.n&%$Hi!EDC#zb~}|uts9Zpo5Vlkj0Qgfejib(`edc\"75*1-"`B^]VUTxXWP8Nr54PImML.DhHA@EDCB;_?>~<5Y9270Tu-,+Op.-&+$)"75*1-"Fg%|B"75*1-"!~wv<)"rooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo;

Layer 1: ><>

D'`;#]8JIY4jEhw5uRQ+rpLo98*Z('D2CAdbx>+<)yxZpunsl2SRngfe+Lhg`_^$EaZ_^]V[TxXQ9UNrLQJOHMLEiCBAF?>=a;@?8=<54X876/4-Q10/o-&Jkj"F&%edAbaw|{tyr8vuWVlkj0Qgfejib(`H^]#a`YA]\[TxXWP8TSLQJnHlkE-CHAeED&B;_?>=}|4Xy1U543s+O/o-&Jk)"!&}C{c!x>|{zyxqY6Wsrqpi/mleMiha'HG]#a`_^W?[ZYRvPUTMqQJ2NMLKDhBG@?>b%;:?876;:3W10543,P0/on&J*)('&%${z@~w|uts9Zvutmlk1oQPfkd*bg`_%cbaCYX|\U=YXWPtT6RKoOHMFEi,HGF?DC<A:^>~6;4381Uv4-2+*Non&+*#Gh~}|{"y?wvuzyr8vXWsl2ponmfN+Lbgfe^c\"`Y^WVUySRWVOTMqQPONM/EiCHG@EDCB;_?>=}|49870/.R,1*N.n&%$Hi!EDC#zb~}|uts9Zpo5Vlkj0Qgfejib(`edc\"`B^]VUTxXWP8Nr54PImML.DhHA@EDCB;_?>~<5Y9270Tu-,+Op.-&+$)"Fg%|B"!~wv<)

Layer 2: Malbolge

macro_rules!f{($t:tt$i:ident$m:ident)=>{fn$i$t{$m!["The Last 1"]}}}f!{()main print}

Layer 3: Rust

The Last 1

PkmnQ's Answer, 2 layers

printf("Code %s." % "Golf") # Python doesn't use printf?? (Of course I know what Python uses. (print))
# ^ The letter i. Superb letter. Seriously, it's one of the only two letters that can be a word by itself.

Layer 1: Underload, outputs:

print("Code %s." % "Golf")

Layer 2: Python 3, outputs:

Code Golf.

Quintec's Answer, 2 Layers

//"/pr/in/t('C/o/de /G/o/lf./')"#ec/ho/'C/o/d/e/ G/o/l/f/.'#con/sole/.l/og/('C/o/d/e/ G/o/l/f/.')#g))#:jd@#$%6a

Layer 1, Laser, outputs:

print('Code Golf.')

Layer 2, Python 3, outputs:

Code Golf.

Dion's Answer, 4 layers

Layer 1: MAWP 2.0, outputted

print('112;114;105;110;116;39;84;104;101;32;76;97;115;116;32;49;39;')

Layer 2: Python 3, outputted

112;114;105;110;116;39;84;104;101;32;76;97;115;116;32;49;39;

Layer 3: MAWP 2.0, outputted

print'The Last 1'

Layer 4: Python 2, outputted

The Last 1

You need to set the 'Max executions' to a high number on the online interpreter for the first one.

JosiahRyanW's Answer, 4 layers

"/-G^A_:;aT$e}qz\"7\"y^&'7T|-q3ZO@,]GN6==3g4U^Y)S_L7:fVp6_4'!s,a8IUK1[ Sp.)Ae)/P%ZY&D*K>j6feVfN1Fky,Vl2Z'?ie%\"<f,nv\\VS&T^e]5ZP}j!6/AivE` 0>9x<DdQL# kdzrz~sSO\"7[&U"{32-}%95base
3base{'
    '1/=}%

Layer 1: Golfscript, outputs:

Layer 2, Whitespace, outputs:

print" ".join("o"*int(c)for c in str(int("hevvbe0ammyi19tg9ubck4j315jnmd5y0ppsvgebn",36)))

Layer 3, Python 2, outputs:

ooo o o o oooooo o ooo o ooooo ooo ooo o oooooo oo oooo ooo oo ooo oo ooooo o oooo o oo oooooo oooooooo oooo oo ooooooo oooooo ooooo ooo o ooooooo ooooo o ooo ooo ooooooo ooo o ooooooo oooooo oo ooooooo oooooo o ooooooo ooooo oo ooooooo oooo ooo ooooooo ooooo o ooo o ooooooo ooooo ooo ooo oooo ooooooo

Layer 4, Poetic, outputs:

Code Golf.

Kevin Cruijssen's answer, 2 layers

,322,241,245,241,245,313,245,241,241,315,245,241,245,241,315,245,245,245,245,245,245,315,315,245,245,241,241,315,313,245,313,245,245,315,241,241,241,241,241,315,245,245,315,245,241,245,315,322,241,245,245,245,245,245,241,315

Layer 1: μ6, outputted

zaeaeueaaweaeaweeeeeewweeaawueueewaaaaaweeweaewzaeeeeeaw

Layer 2: evil, outputted

Greetings!

Bubbler's answer, 3 layers

101;1111011;0000;11011111;{110000;11100010;11011110;00110;10111011;000110;10001;0100000;11011;000;11010101;0000010000;10100000;101101;0100000;1101111;0101111;}1001010;0000;100000;10110001;011001;011"00001101110100100010011001000;{111;011111;}1000\1101100;010110;110011;0\;110001;0111010;110010\10110;110001;0110000;\11011;0010;11001;011\11;0100000;11010100\;10110001;101110;1\001;001010;110111\0000;10110001;10\1011;0000;10100\000;0100110111\101101111111"@

Layer 1: Hexagony, outputted

echo'@',~;0j1":&.>10#.#:91 7 4 5 160 127 7 172 30 198

Layer 2: J, outputted

1011011.0111.0100.0101.010100000.01111111.0111.010101100.011110.011000110.0@

Layer 3: Labyrinth, outputted

Code Golf.

Sisyphus's Answer, 33 layers

i=496;a=     0
print('gREETINGS!'.swapcase()if a==447775else'i=%3s;a=%6s%s'%(i-16,a+(int(1/2*2)*int('syd0s6ncczl7ka1ioletm9t1atoqjq2awpshwfxcorai94tcmzim91j2zzq2c08wxjmfmzr0x9euhjojhltjpay0g8t1o78y83a',36)>>i&0xFFFF),open(__file__).read().strip()[14:]))

All layers are Python, in this order: 3, 3, 3, 3, 3, 2, 3, 3, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2/3 (the last layer does not matter).

Special thanks to @Riolku for helping me find the right algorithm for subset sum (because I'm bad at computer science and Google)

Since there are so many layers, writing them all as a list would be rather difficult and take me a lot of time (and anyone who wants to verify it a ton of time), so instead you can verify it by running all 33 layers with this Bash program that compiles all of the layers together.

Let me know if this posting format is invalid.