Reaching level 160 and it's still one of the best of its type. You can play without watching ads or paying but surely they try to sell you power-ups every level. I can deal with that for the moment. The hard levels are appropriately flagged and you might need to play it a few times but they're still winnable. Update on level 375: Uninstalled. You have to close all the annoying pop-ups every time you open the game and you end up playing the same level over and over to make you buy power-ups.