Hi. It's a pretty early prototype and the level editor is still rudimentary. I tweaked the acceleration values a bunch of times and I'm still not sure how to get it right. I think it depends a lot on the kind of level design you're going for, so I'll see it as I go. The main point of the demo is the level editor: in short, there's only 5 tiles types, the first two are null tiles, which means they remove a present tile (why is there two? dunno); the last one is an invisible wall, which might cause some problems if you use it thinking it's a null tile. You cycle through them by pressing 1 and 2 (which I will probably change later). Maybe I should put all that in the readme. Thanks for playing!