This game can be interesting but it's not clean.
Where is the tutorial to explain the controls ? Why my ship is leaving the center when i press Start ? Why the score is in the middle of the screen ? Why i can change the color with a strange interface on the left ? Why do i have to ask myself these questions ?
You have a concept, now you should work on how you show things, don't put elements randomly on the screen.
Make a clean and clear interface with things at the right place, score and high-score are commonly at the top of the screen. When the game starts, add a little tutorial to explain where to click. Add a second button "Change color" and make it directly changing the ship color, we don't need a "ship-validator" button (unclear) for that.
Having a concept is a good start, but it's not enough to make a good game. Having a clear interface to make things easy for the player is as important as the fun your concept will deliver.
Keep working and things should be great.