I've played other Dino Defense games and these were challenging but manageable. This is the first one where you can reverse the bonuses you've chosen, but even so it is impossible to pass the games midway through the 2nd level. You cannot continue the game as long as you've not at least succeeded in passing the prior game, so at a certain moment you are just stuck. I've tried a lot of different choices of bonuses & do not succeed. I have a lot of experience in tower defense games and this is simple no fun!

I'm not happy with this game at all, in that even the easiest skill choice is far too difficult to win. The developer should have given more choices for those of us who aren't professional gamers!