Congrats on making this game in just a few days!
I was able to finish this in 147 second according to the end screen. I found a section where I could shoot two domes over a wall without much danger of being attacked. I felt clever at first, but i think it really dulled the overall pacing. Also, I would strongly encourage hold-to-fire controls for any shooters. The constant clicking can become an accessibility issue and was really tiring, especially after spending a whole weekend coding lol.
The core design works and the game plays fine. A bit more readability on the map would help as it was hard to see walls sometimes.
Good job, keep it up!