I added two new challenges. one is pretty simple. Every time you jump you get a random item dropped to you. mixin into jumpFromGround, grab a random item from the registry and spawn it. (might also have been easier with just giving it to the player but it works for now. i will go into testing later if one has bugs)

the second one is the ice trail. you can sneak to toggle it on and off and a 3x3 platform of ice spawns under you wherever you walk. The ice will only replace air blocks and not existing blocks / blockentities.
getting the sneak toggle to work was annoying as to mixin into a sneak method didnt work because i couldnt find the right class. ended up using client.options.keyShift.isDown in a client tick event.