MoneySeize

Disclaimer: This game is very difficult.
Sir Reginald MoneySeize II, Esq. must collect coins to fund construction of the tallest tower in the world!
Jump through stages ranging from simple to ridiculously difficult in your quest to find all 1010 coins.
Use your jump, double jump, wall jump and skid jump to traverse the dangerous terrain of the game’s 50 stages (40 regular, 10 secret).
The soundtrack (including source files) is downloadable from this post on my blog: http://mattmakesgames.com/blog/2009/07/moneyseize-released-soundtrack.html

Arrows to move, S or Space to jump. Up to enter doors.
TIP: If you’re having a hard time with a level, try only going for a couple coins at a time rather than all at once. Doing 5 runs of a level grabbing 5 coins each time is much easier than one monster run for all 25 in one shot.