Congrats on making your first jam game! I was intrigued by your posts on discord and now finally I get to play it!
Gameplay was really good! Fast paced, instantly clear goals- this is what I expect from games like this! There is only one thing I'd add. Since the game is about getting as far as you can it would be cool to compare scores with other players. Online leaderboards! With gameplay like this you'd have some people trying to beat each other scores!
Audio was simple, but juicy. It gave me clear picture of what was going on. As for the graphics- at first I thought they were too simple, but when I noticed the explosions (simple but cool) and cool looking progress bars, I got the atmosphere. This could be a minigame in a Deus Ex like cyberpunk game. What I'm saying is that in the end the graphics were ok :)
The thumbnail on site? The way I see it own style beats AI art. Pair up with an artist- there are always some that lurk on the discord before the jam.
The use of the theme is... ok I guess. I mean "you can't save them all", but there's also no point in doing it here. After a couple of levels I was surrounded by an army of drones that obliterated every threat. Sure, sometimes I saved more, if they happened to be on the way to the white cube, but I didn't care about it much.
Over all- good game. For a first timer- great game :) My advice is to focus on the theme more next time!