Thank you for your feedback :)
the idea is to have a drone and weapons to progress faster and have a better time when you finish the game, the drone will shoot automatically but the weapon has a good damage scale, at the end, you are supposed to have a good weapon and a good drone.
The idea around the difficulty, is you make the game harder by upgrading the boss, which is necessary to win, while making your character stronger, if you want to finish the game fast, you will need to take more risks updating the boss more often.
but you are right, it isn't supposed to be a hard game, it's a game where you play against yourself and build a good strategy to win with the best time.