Thank you for your kind words!
I'm glad you enjoyed the game and thank you for all the feedback! Great minds must think alike, I am working on putting in a ship upgrade system where you will spend the crystals you have collected to improve various stats/abilities. I will likely have a new build out in about a week. There have been a good handful of improvements and some new things added in. I did add in an additional enemy ship which shoots a laser beam towards your ship (and it destroys the other enemy ships)! There are now missions for you to complete which will tie into the ship upgrades, too!
Thank you again for the play and the suggestions!