So far the game is great but I did notice a bug when I fell into a pit of spikes and only took one damage and then was allowed to sit there without taking any additional damage.
I found the bug on the level after you get the module that allows you to dash. I have found it easiest to recreate by dashing at the last second so you hit the wall of the far platform head on and than standing still. You should fall onto the spike, take one damage, and then fall down beneath it.
I have also noticed that on loading the level following getting the double jump, your module switched back to the dash. I was at first confused and wound testing a lot of the keys on my keyboard but I found the key to switch the module. I noticed the tutorial message for the key to change the module, however, came on the level following that.
I SWEAR I am not trying to do this on purpose but uh, I may have found another bug...
When you shrink I have occasionally had the timer end while I was in a small area and would get stuck in the wall. Usually that was't a huge issue since you could just renew and everything would be fine. This time when I renewed it I only got a little more stuck. The bug still corrected itself and shot me back out of the smaller area when the second shrink wore off though.