I have no idea how we are supposed to control the scale of anything, sorry :/
Not your fault bro, I didnt have time to make tutorial level
STEP 1 - Press 1 to select char then it will show up on the right corner scale icon
STEP 2 - Then press E to scale up ↑
STEP 3 - press Q to Scale down ↓
STEP 4 - Press 2 to select weapon
repeat STEP 2 & STEP 3