Yeah the hammer is kind of wonkey. For a separation of concerns the graphic and the hitbox are separate objects, for everything that doesn't rotate in it's sprite, it's just fine, for the hammer, my math doesn't quite line up right, so yeah, that's more or less correct about the hammer. Also, the hammer has a separate use animation for when the character is jumping rather than on the ground. I never thought to try jumping right after using the hammer. So it could very well be that jumping cancels the hammer.

One of two things could be causing the game to lag. If you played on kongregate, there is a video ad that only people who scroll down the the comments see that refreshes approximately once a minute; it's annoying for the player and wasteful for the advertiser. Pausing it prevents a refresh, but I wish they'd nix it altogether. Playing one GitHub instead avoids this problem.

The other thing is garbage collection, I couldn't figure out a good way to manage memory delocation manually (though presumably possible, I might have to use a library in the future) so what I found is that dying (or using a door in some cases) a lot in a very short time frame puts a lot of references up for garbage collection, which in turn can lag the browser briefly.

That's one vote for cute, I was planning on sharing the artwork I made after about a month or so I will upload them, so maybe you or someone else can find a use for some of these sprites as well.

Thank's for the critique. I will take the nitpicky nature as an overall positive.