this game is ridiculous you only get less than 100 coins in a round that you failed even if you earned 300+, we should at least get half of what we earned since it is very hard to earn coins and the upgrades are very expensive and the speed doesn't seem to help much depsite being maxed out. You can only surpass a level by upgrading and to upgrade you need coins and to have coins you have to surpass a level first which is impossible.