Thanks for playing! That first one was meant to be the case but I didn't think it was worth bothering with since you arent going to be doing that much in the first place. Releasing an arrow key causes you to stop moving in that direction, as we dont have any momentum physics. I'll definitely consider it though!
The second one is a matter of balance vs consistency. We ultimately decided that jumps were more useful in our game, so we had to nerf it basically. You would notice people never releasing the jump key and thats more of a chore and less of a fun challenge. We'll still test it out and see how it goes though.
I appreciate you for playing our game and giving us suggestions :DD