It could be a bug, some kind of incompatibility with your computer, or even a confliction with some other program on your computer, Dontai.
If the game ever crashes, post any error reports that you get on these forums. (Copy-and-paste them or if that doesn't work post a screenshot. If you're not sure how to do these let me know and i'll guide you through the process)
Error reports may tell SirPustekuchen (The developer) what the problem is or may provide extra info to help track it down, then.
Alpha 4 is a more complete game than Alpha 3 is. Old bugs will have been fixed, and more of the game will be in English, so if you could just wait another week or so, you'll be able to download it. Don't worry, I'll post a news item on the news page (Homescreen) as soon as it's uploaded.
