It's so fun! I got to a little after level 500 and maxed out on all the upgrades, so it's not as entertaining anymore, but it's still great. Would be cool if there was no limit to upgrades! It's very addicting and a good time waster! Also doesn't drain battery as much as other games. There are ads, but you can pay to have them removed. I didn't remove mine because they were for the most part after every other level, never twice in a row, and they could always be skipped after like 5 seconds. :))

It's a fun free game with a normal amount of ads. The downside for me is that there's no home screen, so the only way to get a second chance on the same level is to die in purpose or close the app before it finishes. Also, each level has a different "perfect score," but there's no way of knowing what that is. For instance, a great run on one level might be 600, and on another level you might easily get 2,000. Other than that, this game is great for passing the time during mundane activities.

Once you've played 5 levels, you've played them all. I maxed out all upgrades early and nothing changed. I figured if I played to level 100, it may unlock further upgrades. Nothing changed. I might've even given this a 2 star, but some level designs are made in a way that at the beginning of the level there are numbers too high for you to touch, meaning you HAVE to pass them. Not to mention, after 100 LEVELS, I've never reached 6k, let alone 777x. It's a huge time waster, just in the worse way.