done
[updated with bbfreeze link instead of just sources]
Here is the final entry: http://allefant.googlepages.com/OwlbyAllefantsourceandwin32.zip
It should contain now an “owl.exe” which supposedly will work without python/pygame/pyopengl. It’s made using bbfreeze. No idea if it actually works. If you have the three dependencies, then running run.py should work instead.
Not really done, but I’m too tired to do anything anymore. It’s possible to reach the top, just recorded a video of it, will post it later. It’s way too hard/tedious in any case. In the end, I wasted too much time on little things (like getting the 3d-wrap-around done) and spent way too little time on the actual gameplay and level design. Oh well, still was lots of fun, I coded more-or-less non-stop 
[edit]
Oh, nice comments.. editing here as a reply. A few things:
If you run into a cat while carrying a block, it will respawn at its original position. So you can always get the map back to its original state.. just can be somewhat tedious
The tunnel cat jump is rather easy, harder jumps are waiting further up. The three mice below it should give you a hint about the solution
If you don’t want to repeat the two times of tedious block-building in the beginning, open up “data/The Tower.txt” in a text editor, then find the “P” in line 79 (and don’t ready any lines below to avoid spoilers :P), and replace it with a “.”. Then go to line 30 or wherever you want and replace a “.” by a “P” After tunnel cat some more difficult jumps and two less tedious blocks puzzles await, so if you actually played until up there, it might be worth it
