I do realize that this is the original Electric Rubber game that inspired your many sequels but that cannot justify me giving a higher score. There are so many bugs and glitches in this game that it's an absolutely pain.
First off is the mute button. Everyone has the same problem so let's not dwell on this any longer.
Second is the upgrades from the shop menu (the basket thing in the top right corner). Out of the 20 upgrades that are available there, only 11 of them are actually functional: the upgrades to capacity and rub power. The idle power and cosmetic upgrades are all broken and a waste of currency. A money trap designed to scam you.
Thirdly is the "Decrease Prices" upgrade. I have no idea how this upgrade functions due to the varying effects it has on the other upgrades. For Capacity, it only decreases the cost of the next upgrade but the one after that returns to its unaltered cost. For Idle Power, it functions exactly as I expected it to: reducing the cost by a small rate. For Rubbing Power, it either gains the same effect as Capacity, Idle Power, or it decides to reset itself to cost kilowatts instead of megawatts. This upgrade is very inconsistent and if it weren't for the Dedication medal, nobody should spend any watts on this.
Fourth and lastly, your daily reward system is busted, thus rendering your Overnight Success medal unobtainable.
This game is a nightmare to play through.