I seen the graphics and was like oh deary me....
Though here is my feedback:
1. The movement if fairly good, along with shooting and enemy movement.
2. The graphics could do with some work.
3. The "Play Again / Submit" should be clearer
4. Once you click submit the "Play Again" goes over the high score mochi which looks bad
5. Once the terrain starts destroying the walking down and up on it doesn't work 100% i.e I'm walking through the brown dirt instead of on top of it.
Overall it looks like you could make some good progress and I look forward to seeing your next game.
This game is boring the best bit was the destructive ground.
simple and fun for a few minutes