I like it as is...
The M is fine. Back me up Astroidkid if I am wrong, but it looks like inclination is the same for all letters, it is just that the font of the M has sloped sides before it is slanted. It makes sense.
if you can't see it...try lining up the middle points of the M to find the axis. It lines up with the angle of the E, S and S just right. I am by no means a great judge of graphic design, but it looks right to me.
In fact - Now that I look at the MAME logo the same way. It seems like a jumble of angles.
I believe (™) is appropriate thing like tlinder called out.