The way that enemies attack each other over friendly fire is hilarious and adds to the chaos.
I'm glad someone caught that, I love seeing one of the triple-laser dudes accidentally hit a bomb enemy and then get blown to smithereens seconds later.
Also, the main way I abuse time slowdown is by cancelling time slowdown before it runs out, since then I can immediately enter it again with the time reset.
There actually is a cooldown to the mixing menu, however it only triggers if the timer fully runs out. I think I'll make the cooldown cumulative, meaning it grows with the more time spent in the menu and triggers whenever the menu closes.