Very interesting concept, though I do agree with the feedback the others have mentioned. 

In regards to making it more obvious when you've hit the line I think some well placed sound effects could work, having one for successfully timing the hit, and one that plays just as you miss. That way you could use the sound effects to gauge roughly when you should hit on the next go around.

The concept is certainly interesting but the gameplay is challenging. I think a more visible indicator of when you have managed to pick up the blue boxes would improve the game, as currently there is no way to see whether or not you timed your button press correctly other than a small score indicator in the top right corner. The camera felt very jerky although this may have been intentional?  Overall a nice project that has potential :)

Cool little project but it is dificult to time when you are supposed to press the spacebar as you cant see where the player character is in trelation to the ground below which isn't helped by the camera as it is always tileted to one side and is not looking down enough to help gauge the playeres position abouve the green stips

Currently not playable :( I look forward to playing when its fixed!