I've played the previous versions of this game and I agree with other commentors, the characters are pretty load bearing and hard to kill when compared to previous game versions. Not sure if this was intentional by the developer.
This could be a good game. The game appears to hog memory as it progresses. It doesn't seem to release anything completed from memory causing it to lag more and more. Also consider adding an option for arrow controls and a mute for the music.
The controls need some work. I don't have problem with lag, but a serious overhaul on the controls would help. This game has real potential. 4/5 I like the concept.