At first i didn't liked it. The movement was too sluggish and the character too small. And bonuses were too many and too insignificant on its own (i ended up with like ten bonuses that kind of did something). Also i didn't like that you couldn't see a preview of what the bonus will do before grabbing it. I mean its fine if you haven't encountered first so you have to try, but the next time after you have try it there should be a reminder of what it does (i know you could open inventory to see but that didn't felt right and it didn't show you the ones you tried in previous runs). And late game enemies with the wrong build were just impossible to kill.
But i keep playing like 3 more times and a got like a burst machine gun and the spring reload twice and it was awesome i liked the movement improvement the spring gave. I liked it so much i think you should consider make a game just arround the spring reload mechanic. and if you consider continuing the game you must acomplish the same feeling i felt in this last run on almost all run and it will be a very good game. also very good art sound design and music but the character is too ᵗⁱⁿʸ to my taste