Minefield Rehearsal.png Interesting twist, pretty well executed too.
I didn't think the chalk-like graphics really went with the theme or with anything else? They do look nice, and consistent throughout the game, but what does chalk have to do with limited space, or mines, or cars?
I got a few glitches, too: I was never able to use the Wrench skill or the Car-Shield skill, they never had a number of use and I couldn't select them. Also in the screenshot, you see that I only have one car, but when that car exploded later I still had one car (then I died when that exploded).
IMHO, it's annoying to have to hold down space to send cars, that's the "main feature", the thing you do most. I suggest moving the control tower by simply left-clicking the yellow squares, then using WASD to send cars.
As others said, you need descriptions for what the skills do before you make people choose. I still don't know what the Wrench and Car-Shield do, and only vaguely understand the sonar.
I know this sounds critical, but I really did have a good time flexing my old Minesweeper skills. That third level is a challenge! Good job 👍