Nice work! Bashing crates and collecting coins was really fun. Trying to manage the turrets, hopping between destructible cover, and considering how to balance objectives and high scores leads to a bit of a learning curve and the potential for some risk vs. reward, given that the levels are designed around such balance. It was quite easy to avoid damage, however.
In the future, I'd like there to be more hazards that populate the levels, both in order to raise the difficulty, as the game was quite easy, and to improve level variety. Having optional objectives or collectables sequestered in difficult sections of the map may also be an idea to give the player some agency over the difficulty curve.
Aesthetically, the pixel art on the characters was charming! Given more time, I'd like to see more varied environments/tilesets if more development is planned for this.
Great job!