We're big fans of Icy Tower, and always felt it would be really cool if it had more platform types and powerups added to the mix. It starts out simple, but gets really intense after you unlock double or nothing platforms and all powerups. Also includes over 20 in-game achievements for your gaming pleasure :)

How scoring works: Every platform you jump over adds 10 points to your total combo score, which is then multiplied by your multiplier and double or nothing sequences completed (if you have those platforms unlocked). Everything is then multiplied further by a height multiplier (which grows the higher you climb) and style multiplier.
Double or nothing platforms: After unlocking them in the store, landing on one initiates a 10 seconds countdown in which you have to sustain your combo. If you succeed, your combo is doubled. If the combo breaks during the countdown, you lose it all.
Super mole platforms: Give you faster speed/acceleration and lava protection for a short period of time.
Golden platforms: landing on them adds a bonus to your combo score, which is then multiplied as well.
Michael Jackson suit: gives you a style multiplier that further multiplies your entire jump score. Active for a single jump.