Unicorn Overlord isn’t so much about why you are journeying, but more about who is joining you, who stands in your way and how good you look whilst progressing.
Froggie - A Retro Platformer is certainly worth consideration. Go in with expectations low, and you should be pleasantly surprised by how well this retro platformer holds up.
The big question you’ll want answering is whether or not Plumbers Don't Wear Ties: Definitive Edition is worth trying out. Honestly, I’m still unsure.