Really cool game, takes me back to middle school biology days
Once you get used to the patterns, it gets easier, but the speed of which the strand moves is a bit too fast imo
And maybe instead of a base being randomly selected, you should be able to cycle through each base in a loop so you can find the base you need without relying on luck.
Tho, I do guess the randomness does keep it challenging, albeit a little frustrating when you can't get the base you need XD