The controls are slow and a little sluggish, the gameplay as is is a bit too slow (needs more monsters) and the cloud jumping doesn't work very well. There's also no visual signal that you're getting the claimed multiplier from cloud hopping. I like the arrow mechanics though and the fish guys are kind of fun to fight. The random bullets from the right side are annoying though and sometimes there's no good way to dodge; sometimes one hits you into another and kills you too.
Make it more intense is what I'm saying. I also don't care for purely score based games myself, a progression of enemies or levels or something would be nice.