This is a good game to just kill some time with and very addictive, BUT what keeps this game from getting 5 stars are the following reasons:
1) After a while you are literally just repeating levels you have already passed. I don’t mean after 100 levels it repeats, I mean after level 10 or 15 you will notice that the levels are starting to repeat. In my every level should be different, they can be similar with minor tweaks, but not the exact same level you did 10 or so levels ago.
2) As many people have stated already there are way too many ads. I understand it’s a free game, but the ads are long and make it very annoying to play.
And 3) The controls are easy to use/maneuver, but there are some jumps/leaps that are literally impossible because your character can not jump that far. And with levels repeating you are bound to run into the same jump that you can’t make over and over again until you finally succumb and skip the level after the 30 second to 1 minute ad.
Overall: If you want a game to play that will help kill time then this is the perfect game for you, but be aware there are some annoying issues with this game as well such as ads, character/control restraints, and levels just repeating over and over again.