Thanks for playing and glad you found it fun! Appreciate the detailed feedback.
I'll check for a potential bug with the tutorial (buttons not showing up first time). Good to know the tutorial did the job. I do plan to add difficulty levels. So far the plan was only to add easier levels, but now there's motivation to add more difficult ones too :)
Will work on the color scheme as well.
Thanks again for the thoughtful suggestions. Cheers!