I wrote this using love, so it should run anywhere love runs (Windows, Mac OS X, and Linux). The controls are, * right - go right * left - go left * space - jump * r - reload * l - build a random level (cavern) It is obviously very much unfinished and currently just a toy. Oh well, maybe next time. Edit: I added Windows and Mac OS X ports. Windows now has double-clickable "cavern.exe", and Mac OS X comes bundled with love, so you can drag "cavern.love" onto "love.app". Edit 2: Sorry, I forgot to change the links from '.zip' to '.tgz'. Serves me right for not trying them.