I also have the problem with the level not being saved. I have seen a 20 - level player, so I assume that it is not beta-feature? ;) But the game is great. Gave it 5/5 and fav. Also, downloaded stand-alone (same bug with not saving level). I find problems with enemy detection add more realism to the game - it shouldn't be like any other game, as someone said here, with name tags and stuff. Keep it as much WW I as possible, please. :)
Well, I have had this game getting hiccups that cost me combos, when it didn't notice that I've slashed a zombie... But now it had a hiccup and didn't notice that berserker zombie crashed the paper door. Which killed me. In one of my best runs ever. It's plenty frustrating.
Most annoying thing? Game punishing me for its own RNG. It gives me a green ball, I have only one green ball, and it slaps me for not making a combo? Something is not right here.
 "Verdun"){kind=icon}
 "Ninja Slash"){kind=icon}
 "Bubble Sky"){kind=icon}
 "Papa's Wingeria"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}