You are ball and you get money by shooting it into the EVIL red balls. Hold down the mouse, move it and release to shoot it. Press B to open and close the shop When you get the booster upgrade, press space to activate it. You can use it every 5 seconds. Press m to mute the regular bounces, nothing else is muted.
Press 3 to enable the red balls fragmenting, optional because its buggy and I don't have time. Thanks griffpatch for uploading the best tutorial ever but also i didnt finish watching it but it works fine anyways.