It's a very similar game to Fancy Pants series or Journey To Construction Yard. You move in pretty much the same way and there's this typical jump and bounce of the wall move when you're going up to pick up the coins. Pretty much the same engine that's obvious.

Wearing no guns sucks, but it doesn't mean you can't kill. Single jump on a worm's head will make it gone for good. There's a lot of both good and bad things about the game. The good: nice animations, extra lives, ... the bad: no double jumps, no guns.

Oh, an the most important part. Make sure to pick up every coin before you get to the purple door. It won't open unless you filled up your pockets with literally all the money you could get. To open the door you must press the space bar.