This has a lot of potential (I particularly like the story idea of being held hostage by a bunch of aliens and having to complete tests for their entertainment), but ultimately the controls are holding it back. It feels like I'm slipping and sliding on ice constantly, which makes the game much more difficult (although it was also strangely fun). I would recommend much more drag on the player when they're moving and allowing them to move side-to-side while in the air to make the controls feel much more tight.
tl;dr: Could be a great game, but the slippery controls are holding it back.