Fun concept, captivating but needs a lot of balancing, you become overpowered quickly and enemies are not able to kill you at all. I don't get the purpose of upgrades that reduce spawn of enemies - better would be upgrade that make enemies stronger and increase their spawn rate.. I 100% your game but around 80% of upgrades can be bought after just last quick run at the end when you earn 100k of those shards. The beginning of the game was was really cool tho and I enjoyed it. Good job and the graphics look really polished.