Reminded me of a game Brackeys made himself (the platformer where you don't trust the level and use your mouse to detect traps). Aside from this, just gorgeous, both in terms of mechanics and aesthetics. I didn't have any sound effect on my end, don't know if it was missing or just my computer acting up, I guess aside from the SFX missing I enjoyed this a lot!
It was odd at times to use the mouse and speed through the level to make it in time (both mouse and keyboard at the same time can be odd for this), definitely would become an issue if this was a larger scale game (because it'd be restrictive in terms of design)!