Fun little game, that can become great with a bit more polish and other obstacles. The dash needs a bit of work, the range is a bit unclear, sometimes it just teleports the player to the other side of the screen, not even touching enemies on the way, and other times it only goes a little bit further. Adding particles and points for every destroyed enemy will make it feel more fun as well. And as someone suggested, adding obstacles or even enemies that can't be dashed through will go a long way to keep the gameplay interesting. Overall well done though!