To achieve all this as a solo dev is impressive. I must say, you have a talent for game design. There are small things that very often get overlooked in games that you had done wonderfully.
The reminder for pressing up to interact on the first interaction, the slow scaling of difficulty, introducing a mechanic and requiring the player to master it as you get further. A good blend of what is known and unknown. You have some nice teaser moments such as showing the delivery station of the fire level but you cant get there and and up falling to a very nasty level.
Pario is very cute and the animations are nice. The biggest weaknesses of this game is the lack of audio and the ui. But doing all of this yourself is just wow!
It's unfortunate we do not get to see what the end result was. If you did version control with git, id be happy to help you out on fixing up a nice build for webgl.