Use these levelcodes without the quotes:
2 - "POTATOE"
3 - "SIRFRED"
4 - "FLOWER"
5 - "CIRCLE"
6 - "SODA"
7 - "PHONE"
8 - "WATER"
9 - "FIRE"
10 - "HOUSE"
11 - "DOG"
12 - "TRAIN"
13 - "ANACONDA"
14 - "HYPPO"
15 - "SPEAKER"
16 - "TSHIRT"
17 - "SUN"
18 - "MOON"
19 - "NIGHT"
20 - "TOWER"
21 - "CASTLE"
22 - "WHITE"
23 - "CAT"
24 - "AMADEUS"
25 - "EGG"
26 - "CAR"
27 - "MACHINE"
28 - "STARS"
29 - "JUPITER"
30 - "SHIP"
31 - "FRIENDS"
32 - "ROGALO"
33 - "DAY"
34 - "ICE"
35 - "STONE"
36 - "SWORD"