They say in the description it's written in AMOS. Just like games written in Backbone, have very high system requirements to compensate for inefficiencies of the language. Just be glad someone is working on some new software, eh? 
AMOS doesn't require as much resources as Backbone... Can't be compared these two.
AMOS became famous and widely used by newbes and beginners way back because of it's modular system and well prepared extensions like AmCaf, AMAL etc. So practically everyone can make a small program with opening a screen, loading a gfx, 2 sprites and a protracker module with some sound samples and that's it, a game is ready in the moment when you add collision detection and start the mod to play... (Before anyone asks me to provide something like that - I'm not interested, and also can tell the reason why. I can't jump over the high quality standard which have been set in 1989 with SOTB, and 1992 with Superfrog. so from that point I'm realistic and know where are my limits.)
Moreover:
http://aminet.net/package/dev/amos/beast_scrollThis was written in 1996.
Now I'm waiting for AmiVania (or what it was) to be released first.
Not offending anyone, just stating facts.
