melody's parkour blocks

i felt like messing around with some block properties i'd never used before and then decided to make a little mod with some of the ideas i had

this is also my first finished mod, so sorry if there's bugs or anything like that

the actual blocks in the mod

1. the basic block, crafted with one cobblestone and one white dye, used as an ingredient to make all but one of the other blocks in the mod, with no unique properties except glowing
2. the dark basic block, crafted with one basic block and one black dye, the same as the basic block without glowing
3. the double jump block, crafted with one basic block and one light blue dye, doubles the height of jumps
4. the double speed block, crafted with one basic block and one yellow dye, doubles the speed of movement
5. the falling block, crafted with one basic block and one purple dye, falls after a quarter second when walked on
6. the ghost block, crafted with one basic block and one gray dye, only solid for a half second when right-clicked
7. the no jump block, crafted with one basic block and one red dye, stops jumping completely
8. the slippery block, crafted with one basic block and one lime dye, very slippery
9. the soft block, crafted with one basic block and one pink dye, stops all fall damage from any height
10. the bouncy block, crafted with one basic block and one blue dye, bounces anything that steps on it 5 blocks high
11. the wall slide block, crafted with one basic block and one cyan dye, lets entities slide down it slowly as long as they're not falling too fast
12. the ceiling climb block, crafted with one basic block and one green dye, lets entities slide across the ceiling
13. the chameleon block, crafted with one basic block and one orange dye, cycles through the previous blocks in that order when right-clicked
14. the admin block, crafted with one basic block and one magenta dye, allows the player to input a command into it and have it run that command when something steps on it
15. the replaceable block, crafted with one seed, not solid, partially transparent, and replaceable

there are also two gamerules which can be used to moderate survival (and adventure) usage of admin blocks to prevent cheating, one which prevents survival players from opening the gui and another which prevents survival players from setting the command

WARNING: ADMIN BLOCKS WILL LOSE THEIR COMMANDS WHEN YOU EXIT THE WORLD! THERE DOES NOT APPEAR TO BE A WORKAROUND FOR THIS. IT IS RECOMMENDED THAT YOU CTRL+MIDDLE-CLICK TO COPY THE BLOCK WITH ITS NBT TO SAVE THE COMMAND SO YOU CAN PLACE IT AGAIN LATER. IF I FIND A WAY TO FIX THIS, I WILL.

feedback is appreciated!