Overall a pretty fun game. The basic move and jump controls felt good and the image to demonstrate the controls makes understanding the controls nice easy.
I found that trying to use the dash with a double space was rather awkward and I didn't really end up using it because I was expecting to jump higher instead of dashing left/right. This also seemed to apply a little inconsistently - was there a cooldown for this I wasn't aware of?
I also felt like running out of time took me by surprise, since I was concentrating so much on moving around, I didn't notice the timer changing. Some extra player feedback, whether that's audio, or changing the border colour might be a good way to help with this.
The short increment the blue bobles give makes for a brutal, but entertaining challenge. Great job!