Well... Not a doctor Confirmed ! Even in space :p
Had some fun, the fact that you made it sci fi and you operate alien patients is awesome !
Liked the fact that you can quickly change tools with the wasd keys although i think it would help to have like a hud element where you see at all times what instrument is bound to what key to help quick swapping, and i liked the whole downtime between levels with the bar and character dialogue, character design is pretty cool too, kinda have a maniac mansion NES version vibe to them.
The only negatives, the mouse pointer on the menu is a bit hard to see where you click since it's square, and one you probably know cause i think i encountered the bug mentioned on your page (the green organs that didn't really cooperate when trying to drag and drop)
Other than these, quite fun, its kinda trauma center... *corny 50's echoed voice* IN SPACE !
Jokes aside good job :)