The character swap idea opens up a lot of possibilities here in what is certainly not a tiny world.  There's quite a lot here!  At the same time, it can feel kind of cramped at times.  I'm sure you wanted this free world to explore because of the jam theme, but I think having each "section" of the world being its own individual platformer level would probably be more digestible and less overwhelming for the player.

This is a surprisingly complete little platformer (or not so little, the world seems HUGE), considering you only had 48 hrs. There is a real variety of enemies, and I thought the mechanic of changing characters to use different sorts of terrain was clever. My main criticism would be that it didn't seem the level design gave me any clues about where to go or what to focus on, so I just had to wander at random. Granted the theme was "exploration" and this game forces you to do that, but I think it would have been better if the terrain communicated something about where you need to go to find what you're looking for. Does that make any sense? Anyway, you did a lot in a short period of time and should feel proud.

neat game 

False advertising! This game world is anything by tiny.

It took me a bit to figure out how to change characters, I read the instructions to mean mouse wheel, up/down, e/f, etc... but that was just me being dumb. Once I realized the up/down arrow did nothing, I put my hand on the mouse and it was a fun platformer with neat mechanic.

the game's fun at first, but then gameplay becomes a bit too repetitive, love the music tho.

I am sorry to say this but the idea is not very original. But it had some interesting gameplay! Still great job!