Happy to see you find fun my game :)
About the enemies, I still need to balance it more for that reason, at the end the game can spawn too many enemies but the blue-white bullets from the ship that shoots a lot can be tank since it only do 5 damage.
And about the space cloud in space, I tried to explain it in the "introduction-tips" section (It's the only way I could think of to justify the electric storm hahaha, originally this wasn't planned so I had to improvise this boss.)