Ha ha, thanks, but your art's not bad at all :). I believe platformers are more difficult to make, with it all about precise controls, AI and such, so I thought I'd go for something smaller and easy to build on my as first game. Also, I absolutely love Turn Based Strategy, so I thought "Why not?".
You've got it. It's a score based game, but I've yet to decide how to count the score. Just number of turns survived? Maybe include kills? Any multipliers? So I've yet to implement it.