Cool idea
Bloom/Blur is overkill
Movement feels way too sudden but i could get used to it.
Overall it felt like there's too much stuff introduced at the same time, like the invisible walls. I had no time to adjust to the setting/controls and basically the game was on a timer and over by that point
That would kinda fix your content lack.
first level - just basic movement, nothing else
second level - timer
third level - invisible walls
Its kinda hard to keep in mind at first that you are good at your game when you make it, but other people are not :P