Humorous and quirky! Like some others, I was unsure of what the units on the tape were until I read some of the comments. I got a few right after some trial and error! Maybe it might be interesting to play with the idea of scoring the player on how close they got to the correct answer (more points the more precise), rather than just a correct/incorrect result. This would give more wiggle room for the player to play through the game, while keeping the quirkiness. Just a thought though.
Great job on the game!