The last level was believed to be 19, but it actually isn't.
When you beat level 18, you will get a "YOU WIN" screen. Type this, but not in the chat: "Piesaurus". You will then be transported to level 19, the pie wonderland. You will be teleported in front of a delicious pie, but if you eat it, it will detonate. Then after you say no, you will be at the final boss - THE REAL final boss! Dodge the pie-bombs until the bombs reach the boss and detonate. After many detonations, you will win. For real.
This game is glitched. (BMX) -18 1i 18 1i,ie 2g v8 2g,18s 27 190 25 194 23 197 1u 197 1p 196 1l 193 1h,192 1h 18s 1e##S vl 1t,B u0 26 2q,B ua 26 2q,B uk 26 2q,B uu 26 2q,B v8 26 b8,B u u b8,B k u 2q,B a u 2q,B 0 u 2q,B -a u 2q