Questions in Game Dev

What engine should I make my game in? Making a story driven RPG, and I'm stuck between the two. Pick for me

Hey guys! I need your opinion on when you want me to release the new Beta for Smash Ringtail Cat: The Ultimate Glitch Annihilator since I've just got done with it. I want to see which date works best for you, so vote down below.
Which on should I use, your answear was sega... so now a further qeustion... What details should I do?

LEVEL 2 Playtest have gone LIVE 2020-09-12.
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DONT FORGET THE OFFICIAL DEMO RELEASE 2020-09-30
What type of pixel art work should I use?
I need help with my fangame so if anyone can reach out to me then thast fine.
The new game was still in development but due to that we need to know how many update ya want
Which art style should I choose...