I think it's pretty impressive how much you've been able to do considering your experience in Unity. I love the effects you've added. A few details to improve the game : slightly reduce the camera shake when you shoot and be able to go to the next level instead of going back to the menu. Good job =D

The game was pretty good just the movement was a bit unresponsive. Generally in platformer you don't check ground to jump but instead you check ground and let player jump even if it's 1/10 second later that ensures that the game is responsive. Also the speed was way too much and the jump height would've been fine if it was hold to jump

Not a bad game, you did good for only 2 months of Unity.