Unplayable, ads after every single level and the levels take seconds to solve, so you'll spend 10-15 seconds playing and 20 seconds watching an ad. Very much not worth the effort. Edit: Also, I saw that some representative of the developers responds to many of the comments that other free games also have ads. - No. No one has as many as you. Normal games of this sort have an ad after every 5-10 levels, not after EVERY.SINGLE.LEVEL. We, the users, should know, we play other games too.