I like this! It's a pretty nice concept and you implemented it well. I do have a couple critiques though.
1. I think it would've been a lot better if the forces were stronger? Like if the gravity pulled things quicker and the thruster pushed you faster in the direction you were going. Right now it sometimes feels like I have to get lucky with how quickly things take effect, if that makes sense.
2. I floated out into space and ran out of gravity :( - If floating off for too long caused a game over, that would stop you from having to reboot the game whenever that happens.
Again though, it was overall a fun experience! I know it is quite literally an arcade-style game, but it does feel like something I'd play in an older arcade.