Fun game! Nice puzzles, re-uses, pathfinding, trial and error, everything's there. It also runs fine on my stock A1200+4MB. Glad to see you didn't give up backbone and made a game that feels complete. Thanks for making this!
I did find a bug though. In level 14, when you pick up the key, the game will crash to workbench with error: File not found. I used the version from Aminet and I encountered this in both the easy and final version (v2.5). I checked but the files of level 15 are there. It happens when I pick up the key, even when I haven't collected the other items yet.