With a recent build (0.0.2.5327), there are no glitches. Works only in 1280x720.
Vulkan + Recompiler + load liblvl2 only seems to give the best speed.
On windows, speed is quite good (50-55fps).
On a linux machine, with mesa, I'm more in the 35fps.
I suggest moving it to the "playable section".
If only we could have local 2 players controls, that would be fun...
On rev0.0.2-5395, archlinux, i7-4770 & r9 fury, with opengl (mesa) and recompilers, I get 60fps almost all the time at 720p.
With vulkan (radv), I'm at 35fps and there's a white wash (known bug).
With opengl, it's very good: no glitches, excellent fps.