Great Concept. The monotony should be broken up a little bit. Instead of straight to 35k make levels or brackets in between. At 5k BLANK happens. 10k Something else happens so on and so forth. Its real fun watching the coins and monsters sputter everywhere. Once you have the vacuum and 2 auto shooters its pretty easy. Once you get the better guns and upgrades you dont even have to move/ dodge monsters. Worth about 15 minutes of playtime. Can clear whole game in about that time if you buy nothing but the auto turrets, vacuum, bow with scatter RPM and explosive upgrades. Little to no challenge.