I love the pixel art, there's a lot of character to all the little animation transitions. Very strong game stylistically.
The gameplay is quite fluid, but I feel like it needs more of a hook of some sort. An incentive to play and explore the level rather than speeding past all the obstacles. Maybe hidden environmental interactions or a bonus at the end for rescuing all the people. Perhaps there could be mech-suited human enemies that become naked after you defeat them, or some sort of hub where all the people you save go. Speed as a core mechanic is totally fine, but I don't think that in the current form the game is really well suited for it. The detailed environmental design is really inviting for a more exploratory approach.
Very cool demo. I'm excited to see the next big step for this project.