Thanks for playing.
The icon for the amount of chess pieces isn't representative of an icon, it's just something that pops up when you collect one to show you how many you have, then disappears 5s later.
The buttons on the wall were meant to be used in conjunction with the sphere ability you collect at the tower.
And yeah, I forgot to change that black switch collision box from a mesh collider to a box collider, so a lot of people got stuck on it due to how collision checks are performed in the autonomous movement system.
Thank you for the feedback