Level 4 was absolutely the level that made me give up on the game 30 years ago. Although that was with a set number of tries (lives). I think I only managed to complete that level recently when I paused the emulator and planned out the route with my finger. 🤣
Unfortunately 5 levels was the limit. Tried compress the levels but the overall size ended up being the same because, unsurprisingly, lots of comma delimited numbers are going to be pretty compressible by the pico algorithm whereas a string of random bytes and a decompression function is not.