Wow, this is a great game for it being your first one! I can see all the care that went into it. I tried it on Windows/Chrome and Mac/Safari and the full artwork was there for the first level -- I like the forest artwork as well! One other thought that I forgot to add last time: you might look into implementing "coyote time," which many players expect for platformers, especially if there are precise jumps (I remember a few of those in this game). Nice job!