Good demo, looks very promising and I'm looking forward to the full version. I won't point out the problems almost everybody experienced such as optimization problems and bugs and glitches, that would be not a good review. Everything other than that is good, only suggestion is the ability to look down while not in mid-air, because the contrals are a bit janky and jumping to shoot a block underneath you is a little bit hard, but we don't know how much of that will be in the full game, so adding it is not a necessity (if I spelt that correctly) right now, but fixing the issues and finishing the game as a whole is.
Good job! Keep it up, really looking forward to the full game!