(I am now in a rush to test as many games as possible to help, so please do not mind the cursory reviewing style.)
controls are QWERTY-only instead of layout-independent
nice having a settings menu
This looks like a mix between classic shooting fights and Worms! XD Funny. :)
some (especially visual) indications as to what is going on (whose turn it is, how much movement is left, how much damage is dealt) would greatly help the player
looks like the first enemy committed suicide
I think it would be easier to play if you could vary the power of the shots, as in Worms
link to theme is a bit loose
contrast between rather detailed characters and somewhat bland scenery; maybe add a (non-bothersome) background?
stopped after losing a second time in level 2, which is rather hard
Takeway: gameplay is original and has potential, a mix between classic turn-based gunfight duel and Worms (artillery + destructibility).