Ok. Tried again today. It’s nicely done.
IPhone 6s.
I think a pause button during game play makes mores sense than a start over button.
I would like enemy bullets to stand out more and be consistent. Different colours are hard to follow.
Trees have a bullet like effect with simular colour to enemy bullets to add to confusion.
power ups are small and don’t stand out too much. Blinking effect would help.
controls are different. Not bad. Just different.
lots of good things. Just my thoughts for initial plays.