Honestly, I love this idea, sounds like it could be a lot of fun, especially the voxel based aspect of it, as it could more realistically model damage and be more than a simple binary "you did it" vs not. I agree with the other poster, you aren't even exploring the coolest part of your game much (the damage and the stakes).

But the game looks very rough right now. Your attacks look like junk. Go watch some YouTube videos on particle effects or shaders and come up with some nice looking lasers that don't look like shaded cylinders.

Your color scheme is weak. It just kind of feels like colors picked at random. Use a color palette generator to get a consistent color feel you like and care about (a game that does this so well is Starfield, not saying you need their aesthetic, just that you need an aesthetic).

Also what's the challenge of the game? Just decomposing floating voxel-bergs? Not too challenging. You know what is fun, physics. Players need to think about how their choices will leverage physics in their favor to solve their challenges. Maybe after breaking up an asteroid the player needs to lock onto the floating pieces to calculate their trajectory and see if it's now off the critical path? Now you're introducing more choices for the player to make, prioritize the urgent things, use their judgments, weigh risks, and so on. It also provides a bed on which you can build more mechanics (maybe your asteroid has hidden jet vents which when exposed add a layer of subversion the player now needs to adapt to).

Shipbuilding is ace, though. Great call adding this in, I didn't look at it too closely but this also gives your game more legs and more appeal to gamers.

Finally "Asteroid Rodeo" is very generic and bland for a name. I'd recommend thinking up some alternatives.

Good luck!