This game is good, and it shows a lot of promise.
Everything about how it looks and sounds is perfect, but I think there are a few things about the gameplay that could be improved.
1. The prisms take too long to kill for just being roadblocks
- If they also shot back at you, that would be cool, but otherwise I would make them satisfying to destroy, like pots from the LOZ games
If they had coins in them or health-ups that would be awesome
2. I want to keep the tri-shot upgrade even after I get hit
3. Make the ad placement more significant
- one easy way to do this would be to make it so you can have only 1 or 2 ads down at a time, but they block all bullets until the ad's HP is depleted.
With all that said, bravo to you and your team, Cedric! Especially considering this is your first game jam!