It's a fun game but the ads are way too much to the point that after finishing every level, you need to watch around 3-4 ads before you can proceed to the next level. The problem is not the presence of ads but the amount of ads where the time spent in watching the ads is probably equal to or more than gameplay. 1 ad per level is reasonable and if you want to have more ads, maybe give incentives when the player chooses to watch more. The mountain of ads took the fun out of the game, sadly.