Absolutely wonderful game!
I really enjoyed playing the demo, lots of cool things to do!
Game itself ran really smooth, no glitches or bugs. Combat felt really nice as well and easy to learn.
The customizing was a bit confusing though, there is just too much to choose from.. Perhaps a skippable tutorial would help in the final game.
My one point of criticism would be that the enemies look a bit generic. It feels like most work went into designing the mechas, and less in enemies. I think fighting the same looking enemy time over time might get a bit repetitive and boring to some people. Just my two cents, of course.
Finally, like others, I made a video on my experience. Feel free to use it for promoting your game!