This is a nice concept of the game, even though as many others said it's rather hard to keep up with a giant horde of enemies while you have almost nothing.
My feedback:
- Try to find some custom font (just search for google fonts or look for the ones you have pre-installed in windows and then try to re-download them) It is a nice touch that improves the look of the game and takes few minutes to implement.
- I've left in the main menu for a moment while writing a message to a friend. It has become super LOUD.
- The enemies see you before you can which I think should be the exact opposite (so that you can do some proper stats), maybe possibility to move the camera further from the player?
- For some reason, a lot of objects disappear when they are near the camera? I'm not sure but I feel like when the grenade/ bomb
- I think the buttons for buying stuff should be accessible without going to the main menu?
- The game needs serious rebalance
- You could try and learn how to make art for the game, I recommend learning Inkscape for this game as it would be the easiest of all to learn.