Well, I have a coupla other projects going on right now, so I'm not actively working on it, but when I do pick it up, I think I'm going to make it less of an Arena game and more levels-based. Still lots of enemies, but also maze like levels with switches and powerups and whatnot.
Seems cool. personally I tend to not be much into arena-type games and kinda prefer when I can explore and find stuff. This is the reason why, for example, in the ticalc.org BASIC RPGs section, I never visit the arena/battle section.
Make sure puzzles are not too hard at the beginning, though.