First of all congrats, but i have some ideas about developing game and I think it will help u a lot.
First issue, it is really sad that there is no variety in the settings, I hope you can improve yourself on this subject. I think you could simply add more than one resolution option.
2. A little problem, I just tried to quit but i couldn't exit the game, I think you overlooked it,fix the in game menu please. All in all game looks good. <3