This is a really cool little game! First off, I had a few minor issues while playing but I don't think they'd be too hard to solve. The game doesn't scale to my window properly, so it only took up about 25% of my screen space. It is hard for me to see and took me a bit to figure out what everything was. Secondly, the controls aren't terribly clear as @Tiny Dice Studios pointed out. (For anyone reading this, you left click to select a unit and then can right click within ~5 tiles to have them relocate. You can tell where they can move by the color of the tile indicator.) I think once selecting a parasite, having the whole area highlighted where they could move would help clear things up a lot. It was tricky as I would select a unit, and then click far away and slowly start moving closer to them until I found the maximum distance they could move as I didn't notice the color of the tile selector changing until playing for a little while.
However, you've still put together a good product, especially if this is your first jam. Great job, hope you're able to join the next jam!