Relaxing game with nice looking graphics, calming music, it's nice, I love it!
I've encountered a "bug" during my gameplay. I've got a lot of coins, and I have decided that it's s great idea to boost the speed to around 1300m/s and the thrust force to around 3000 :))) and in the first 10 seconds I've got stuck in the ground, but that's probably my fault, I shouldn't really do that, sorry :))
Then, there is really no need to fly in the air, except for those bomb coins. You can see the bugs though walls, so clicking on them while on the ground works just fine, but I believe, it's not really intended. Probably the easy fix for that would be to assign a new button for "shooting" the bugs, so you will be flying in the air with the left click, and with the right click you just target them and destroy them or something. Also, I don't think seeing the bugs through wall is a great idea, for the reason I talked before. I believe highlighting them only while in air would make the game more challenging, and will force the player to go up in the sky.
Anyway, hopefully I didn't scared you with my long comment :))
The game is great, the controls are alright, and overall that's a brilliant game! Well done to you!