thanks glad you saw the improvement, the movent code is largely the same set of libraries I put together for PV, and suffers many of the same issues (I got too carried away world building to find time for fundemental movement code). If I do a third entry, creating a fun movement mechanic is the first thing I plan to address (then again I said that this time too).
The gas was meant to act as a locked door with the mask being the key (as well as an obstacle to be timed) hence I ended up making it too deadly... but even accounting for that I know I can have done it in a fashion that was less annoying!
The boss fight is very rushed... I had an idea where the boss would have different states and the orbs would have responded in kind, eg a defensive state where they circled him, an attacking one where they flew out in all directions, but I never found the time, and I know a few sound effects would have helped a lot in the fight too!
Thanks again for playing, especially through to the end. All the criticisms are all valid, and I'll take them onboard as I to want to spend a bit of time polishing this game! Though I am already eyeing up a new jam so we'll see ;)