I found a serious glitch.
Before explaining it i must say that this game is awesome. It has innovated the idle type games.
See, if you already have some boards with some upgrades and you're playing the game in high quality, the dps factor refreshes at a significant rate. BUT if you change to low quality and wait a few moments and change again to high quality you will realize that the dps rate will significantly rise. But if you stay on high quality, it will fall to the normal rate. And here comes the glitch. If you set to low quality, wait, set high quality, wait for the boards dps rise (you'll have to be quick, otherwise the rate will fall again) and then set to low quality again, the dps rate freezes! And then you can do it all over again, many times. At some point of the process you'll have boards generating A LOT of money.