How does the pacing of the game feel, is it too fast or too slow?
I think the pacing is perfect at this point for the module you have. It was fast enough to pressure me but not too fast that I was failing at the like second room.
In what ways might we be able to improve the challenge and the 'hectic-ness' of the game beyond the difficulty of the modules and timing?
As others have said, you can spam click the bottom hardest module to complete it. I think if you went from slowest to fastest that would really improve difficulty and hectic-ness of the game. You could also add some blocking props that the player has to navigate around.
Do you like the current module?
Yes. Apart from the improvement listed above I think it works great.
Would you like to see Ernie have abilities/upgrades and if so what would you like to see?
I think a time or module slowing upgrade would work really great. Maybe a one-time/once-per-room module auto-fix could also be fun
Game breaking glitches/bugs?
The module bug was the only one I ran into.