Great game the idea of you needing to be the one to collect the coins and managing the upgrades is really fun! I just found the game very easy, as eventually you can just collect tons of coins all at once then return to the base and buy tons of upgrades, I think that maybe enemies that stun you for a short time or the coins dissapearing after some time could help add more tension to the game! But overall the game is really fun and enjoyable!