Fun platformer! I really liked the setting, being enclosed in the tight space and going down almost like air vent like tunnels was cool, and there's a hint of portal-esque test chamber type vibe.
The movement felt smooth, albeit sometimes the second jump wouldnt trigger or be a bit delayed which led to a couple of deaths. Only other thing I'd want is volume settings because the SFX could be a little loud! Also have to say I really liked the sound design at the end of the game, super cool!
Solid foundation though, could easily see expansion with more levels and building on what you've got with more variety, music, etc :D