Could be improved,

Not bad overall, decent looking, smooth controls (super important in this type of games).

Definitely suffer from some design issues though, object collision is going to happen because they can come from behind with no warning, or flip floping cameras causing disorientation and colliding with objects you were on course to avoid. A lot of enemies from behind, but no loop the loop to get around them so you need to wait until they get in front of you.

Would love to see maybe some more variety of upgrades, just 2 upgrades is kinda limited.

Interesting "choice" system, although the scoring system is a bit weird since the stars system isnt particularly useful when the players dont have much in ways of a objective list or briefing pre-mission.

Pretty solid, love the no IAP, but it does feel a bit light.

Calyn43x about Star Horizon, v1.0.1