Oh yeah those are some serious ones thanks for the heads up, I verified and fixed the wearables again with an upload just now. Still on the case regarding the previewed pogs smearing and some other things. As for the tutorial lesson, maybe the players should be able to stand and jump around on the stack after building it! In fact you might want to try to do the special slam while standing on it just for fun now that I've added a stable platform and special interaction there.
I also added a bug tracking option in the main menu which should allow quick and easy bug reporting! I might start a new discussion thread for general feedback and suggestions and hopefully your outstanding playtesting here leads as a good example. I can also add some debugging options (like cheat codes) to more easily allow playtesters to teleport around the level and activate things like adding some money or unlocked items to avoid rerunning the same thing again and again, and of course save games which would also solve this are a high priority for next updates.