The User interphase at the beginning is beautiful and well designed , clear and well explained controls , the drilling machines on the sides and the buttons are well composed.
here's some points that maybe can help you improve your game:
-the gameplay would enrich even better if you add objects that also fall to the main character
-including horizontal movement to it will make the experience even more enjoyable
-also a good thing that will help is to include some pause or gameover menu that gives you the option to go back to the main tittle or give you a view of the leaderboards.
I love when the astronaut gets hit made me giggle how suddenly says ''I'm afraid to say thats game over!''
you did a cool job !