Games I got so far:

Electronic Super Joy - I beat this already, but haven't gotten all the stars or unlockable levels. It's a challenging fun little platformer. OST is good electronic music. Certainly worth $1.50. Don't play if you have photosensitive epilepsy. I'm not sure why the checkpoints sound like orgasms.

Recettear - In this game you run an item shop and sell equipment to adventurers. I saw someone streaming it and I liked the sarcastic humor. I'm a sucker for parody. Plus I've read good reviews about it.

Duck Tales: Remastered - Modern remake of the NES game. I've been wanting this for a while, couldn't justify $15, could justify $5 or whatever I got it for.

Reus - I loooooooved Populous back in the day, and I can't help but buy any game that looks even vaguely similar, to try to recapture the magic. God-sims are best sims. This looks like it has some things going for it.