This is a really well designed and executed puzzle game for only 4 days! Gameplay is snappy with good sounds and feedback, and the cutdown move is very satisfying! The undo button is huge for eliminating potential frustration. My favorite level is the one where none of the enemies shoot, but the one right after that is a close second. Having a level with no shooting did feel like a nice twist after getting used to it.
I think my only piece of real criticism is the player being able to dash any amount of spaces to cut down an enemy wasn't clear to me at first. I was trying to sneak up on the right guard on the second level in the top right corner and was confused when I dashed. I think all the rules are clearly laid out in text except for that. I'd potentially adjust the first level so that when the player gets the cut down on the enemy it happens from a long range to really show it off. It seems that the spot you'd typically cut down this enemy you're only two squares away from them, it was so close I didn't even pick up on the distance. Maybe even have the enemy on it's own section you can't reach by walking so the player is forced to learn about the dash before progressing. 
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It is sadly a side effect of trying to cobble everything together on sunday. I had to cut some levels and merge others together (joined together haha), so the effect was also not satysfying for me to be honest, but I had to accept that.
I agree with you are proposing here, it would have been a better level and better introduction. Level 2 could also do some work, but it is what it is.
Thanks for playing Matt, very glad you enjoyed it!