Hey I got all the cubes after spending like 20 minutes with this haha. This was a very nice creative concept honestly. I was very surprised when the mechanics was introduced, and I thought the level design was definitely very clever as well.
There was a few things that did put me off however. First of all is the weird choice of sound effect, I didn't enjoy it at all when it just plays a "noise" sound instead of a nice ping or something similar when you got the objective. Secondly is the overwhelming requirement of dexterity you need to complete the game (I had to press 3 buttons simultaneously in quick succession to complete the last 2 cubes). This in addition to the fact that once you figure out the puzzle but you had to perform the necessary platforming (which is difficult), but then when you fail you had to spend a lot of time resetting the level so attempt it again is quite a bad player experience imo.
But then again I think this was a creative concept, if the controls could be simplified and less unwieldy, I think it could be great!