For someone who's not huge into puzzle games, this one is my favorite out of all the puzzle games in the jam. Super fun I enjoyed every level. You asked for some "hard-hitting feedback" on discord, which is hard because you didn't leave a lot of room for criticism.
Here's some things that I would change if it was my game, maybe you can find some of it useful.
1. I would show the points required before the end of the level. The way you had it show after the level made me always fail once at the start just to see what the number was I had to reach.
2. I wouldn't give bonus points for blocks not used. It made it unclear whether it was worth it points vice to use an extra block, or to just use the block to increase the time a little, since both gave points and it was hard to tell which gave more. Imo it would have been better to just use every block available to try to get the best time available.
3. I would add a button to instantly restart the level. If you messed up and the scientist got past what you wanted it to, you had to wait for the score screen to retry even though you knew it was a failed run. Pressing R or something to restart instantly would have made it a lot nicer to try more timing oriented strategies.
Besides that, I just wish there were more levels. Absolute blast of a game, well done!