The game is really cute! I like the pig tails on the player character, and the dash mechanic was a fun idea. I had a similar problem as mentioned before where the first click doesn't register, and it's also a really weird hand position to try to use WASD and left shit and space at the same time, but the mouse controls were comfy.
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Oh, i have to change the description then! You can use left shift OR mouse click to dash, but you don't have to use both at the same time!
Glad you liked the game, try it with a controller if you can. I also ran into the problem of the click not registering but seems Unity's problem from what I could debug.