Help for all coins on LV1, and to get to S1: Aim for birdie first. Get to a high platform really fast, WJ off the walls, get to that darn bird, and POOF, you have the bird. Now get the other coins. To get to S1, it's at the right, where the little notch in the wall is. Jump, jump off the wall, then jump again to the right, then enter S1. + if this helped. It did for me.
This is probably going to get a lot of [-], but I'll put it forth. Maybe have a couple o' upgrades. Like going to the shop, and there could be an upgrade section, where you had to pay a lot of cheese to do stuff. Maybe run a bit faster for 1000 cheese(yeah, that expensive, so noobs have to work), jump a bit higher for 1000 cheese and double-jump for 10,000 cheese. I know, this will get an extreme amount of [-]s, but I wanted to put my idea ahead.