New game: Earthraid

[LCD]

I was running it in 48K mode. Perhaps that's it.

Just tested something: I used a heap of 100 bytes. After reducing it to 80 bytes, it crashed after generating map (I do not use any strings, just texts). So rising heap to 256 bytes will maybe fix this problem. Currently I make some optimisations for release 1.1, so there will be a new version soon.