Maximal size for a compiled program

[LCD]

Nope, heap did not help 
After several rooms I got this and later program stops react on keyboard events
Code size 36253
Compiler params
--tap --org=24576 --autorun --BASIC --optimize 2 --heap-size=512

Maybe if you compress the graphics and data and uncompress it when needed, can reduce the size of your programm? I used this in "Yumiko". Everytime the player changed move direction, a complete animation set was replaced. Also level data was compressed.