I don’t know exactly, probably around 2 hours in total. Yesterday I played roughly 45 minutes and today the rest. I reached the second level quite easily but some way or another always got hit, lose the power-ups and get too weak for the bosses. Today I gave it another try and planned better the power-ups, reaching the final boss of the second level full equipped with the normal shot (I made a screenshot) and was easy enough, but the journey to get there with that was quite challenging.
Thank you for the explanation about the spawning, I really appreciated :)
