5 stars: Is fun til it freezes and have to start over, have lost everything including stuff that is purchased! Needs an update to fix it and then will be happy to give a better rating. Update took about a week of emailing game developers back and forth until they were able to get it fixed, they were polite and promptly responded to each email. Also made sure I got everything I purchased back.
4 stars: Around lvl 30 it begins to really take a long time to get enough money, the progress really slows down. It's a fun game. I played it about 15 hours and got to lvl 45. I think what make the progress slow down is the fact that you need screws to upgrade, which are slow to gather. The circuit was fun but too short. I would play more if there was no screws. I have watched over 200 ads. Didn't spend any money.
4 stars: Fun game, but the most annoying thing is when you click to watch an ad to double your offline payout, every single time, it never fails, it says that it can't play the video so I have to wait and click back into the game, then it'll work.
2 stars: OK for passing the time but it takes way too long to get diamonds to be able to buy staff. Also when I levelled up the tow truck frequency it was every 15 seconds, a little later I noticed it had slowed to around 21 seconds! This needs to be fixed as you are cheating users to think they are upgrading but then in essence removing the upgrade and making us pay more diamonds for it to upgrade again to get back to whe...