Great graphics and well-polished game.
I think the control is ok, as one plays multiple times and will eventually get familiar with the control.
I haven't played higher difficulties because I can barely pass beginner haha.
What I would suggest is that you can increase the control difficulty gradually as the game difficulty increases. For example, at the beginner level, the spacecraft will automatically keep rotating and shooting toward the boss to let the player focus on dodging the attacks instead of multi-tasking. In the next level, the player needs to press to shoot, etc.
You can add multiple dice in a "God" level to increase the difficulty along with an activatable player skill with 1s iFrame and 10s cooldown, to avoid hitting by inevitable laser attacks.