Very cute game! I really like the art and animations! I do think the ammo reload takes a little too long so it makes the gameplay experience a bit too drawn out. Other than that, nice work!
The reason why regen is made to be slow is you can pick up random falling down ammo to regen more quickly! But we didn't have enough time to test for the perfect ammo cost rate, regen rate and recovery rate. The current one can cause some problems!