It's completely playable, but since you asked for bug/glitches (I've only played it in local mode single player so far):

- One of the orange pieces (right hand side) in the cannon zone clipped through the floor when I let go (it respawned though which was a relief)
- The consecutive launchers in the middle room are quite powerful - I kept overshooting the targets (can be avoided by standing nearer the pivot, but this makes the distance quite variable - it took me about 10 attempts!)
- The levers on the doors in the second half of the level only came into existence when I got close to the doors
- After dropping through the big hole at the end, the level didn't end (I think someone already commented on this)
-It's quite confusing when the orbs (all identical) don't work in a given slot - I saw that you plan to address this by making the pillar go red, that's a good idea.

It's an amazing and well polished level, though! I loved it and can't wait to show my friends in multiplayer. I hope this helps you

I appreciate the feedback! Thanks a lot!

I had most of the same problems as icebev555.

Going in order
-I had issues with the power/placement of the launchers in the middle room. I kept overshooting and undershooting until I found the correct spot to stand before the platform launched me.
-The levers also didn't immediately spawn in my play through of the level either (But I'm sure it's for optimized frame rate for some of the later assets)
-Whenever I finished the level and fell through the hole at the end, it didn't end the level for me and I wasn't able to locate the pass trigger

I really loved the level and like many other people, I don't think the ending could get much better than that!

Edit: One thing that I found slightly tedious was how slowly the launchpad in the middle room and the cannon in the final room were

in the first room, the model of magnet is usually invisible.
in the third room, when you shooting 5 yellow squares to open the last gate, the ball some time will stuck on the wall and will not relocate to the basket. then when you load the check point or restart the game immediately, the items and barrier will not be restored. the only way to continue the game is quit to the hall and restart the map. it makes me and my friends desperate.

I took the cannonball respawn bug as a challenge and climbed the wall to get it. :D