Thank you for the feedback!
1. QWEASD display is mainly a tutorial to teach players what each item can do, so I didn't put it afterward, maybe I should've. Trampolines don't have any visual and sound notification when you use them, only when an enemy or player is on them, so that's probably what caused a confusion.
2. Yea, I knew it might've been an issue, but in the end I kinda forgot about it, oops.