Well, the game works and is not to bad. But there's nothing interesting in it.
It does not feel like a skill game. It's like it takes some skill to survive, but when you die it's just bad luck.
I find the music somewhat interesting, but after two minues it becomes extremely annoying.
Hit detection is pretty bad. Fortunately, it's forgiving. You never get killed when you shouldn't but it's common that you survive when you should get killed.
Graphics are pretty bad. Not the worst, but pretty bad. Especially the strange mix between high and low resolution objects creates a very amateurish impression.
As a first game it's ok, but it bugs me that you think that people are willing to pay for this. There are millions of far better games than this that are completely free. You should become much better at creating games before you ask for money.