Nice job! Kudos for creating a useful tutorial that's really cool. I have some feedback on accessibility: Maybe you could consider an auto-click option? I find it taxing to hold down a left mouse button because of a disability in my hand.
I also find that the weapon seems to lack some punch to it? It would be interesting to see in what other ways the paint currently on the ground could affect the gameplay, so you're incentivized to juggle both action and painting.
Great job!