Agree with other comments. Great use of art assets. Controls are responsive. Gameplay does get a bit repetitive but that's to be expected when 3 hours is only enough time to drill down to one core concept.
For future work on this title, I'd love to see background music added in as well as some wrinkles to add in difficulty. Less time each round as you continue on, obstacles in your path, exploding boxes, etc.
Great work!