Good day. A couple of thoughts after completing three demo levels.
It is often difficult to distinguish one object from another when combat gets intense. Might be worth increasing visibility for player's mech and opponents, maybe tweak the color scheme.
Although performance is generally okay for a demo version, frame rate still drops sometimes, even in the alternative sync mode. A little work on optimization is definitely necessary. Additional visual settings (primarily more screen resolutions) will be appreciated too.
If my understanding is correct, at this point the game only features a female pilot. Some players might want to play as a male pilot, so it might be nice to add one further in development.
Also, if you consider adding more languages, I might help you with the Russian version in particular.