Ok, so Game Builder Garage hasn't really gotten the same kind of attention as Skyward Sword HD or Metroid Dread, but I have seen some games made in GBG that look like they'd be even better if taken further.
Star Fox 63 by Matte Volto:
Waluigi's Crazy Pinball by Guillaume Brien:
Garage Gear Solid by S.Mario.Ug:
What are some great games you've seen made in Game Builder Garage? Please remember to credit the original maker.