Cool little shooter/platformer with a nice visual style. The weapon could perhaps be a little more accurate, as some guns such as the machine gun feel a bit useless and even the sniper seems to require pin-point accuracy for things like the insects. Enemy variety is nice too.
It might also be worth tweaking the room selection to avoid entering more than one weapon room in a row. It took me a few runs to get the sniper, as each time I picked it up I was then forced to change it in a following room.
Great game!