It's almost there...
This is a good concept, and it seems sound coding.
You just need to work on the sound, animation and graphics.
Not sure what happened, but my health bar ran out and I was still going. Maybe you need to take another look. Nonetheless, this game doesn't seem to be complete.
this is obviously a badly done remake of another game matter of fact its on newgrounds! so i suggest redoing it .
Not very good
The graphics look like they were drawn in microsoft paint by an average Joe, and the animations were almost non-existent. There was the train moving, the bullets moving, and that was it.
The enemies (which all looked like nothing other than small dots), never moved and never had any variety. You can earn money to buy health upgrades (And nothing else), but there is no penalty for losing health, so there seems to be no point in getting the upgrades.
All of the levels are identical, and since there are no large upgrades or future leve to strive for, I really don't see the point of the game.