After every level you get a minimum of a 30+ second ad that you can't exit out of (you just run around in circles being diverted to new ad screens) I get the app needs funding, and ads are to be expected, but it's really annoying that the ad takes longer than each level of gameplay. It's a nice game in itself, and would happily play for ages, but I can't be bothered to keep waiting to play each level. Will uninstall.