So here are my two cents:
Nightmares: nice track, musically the chorus reminds me ab bit of Sara Aaltos Monsters (which I quite liked).
Hitaammin hautaan: I like that it is in finish. Apart from that, it's listenable, but not very impressive. But overall it's a solid entry that would stand out in some NFs I could mention...
Sekaisin: Not very many ideas here. I don't hear too much of Luktelk here, but maybe that's just me. For me it's a bit too repetitive, but I wouldn't skip it, if it came up on my playlist. At least it's an ear worm, an endangered species in Eurovision lately.
Aina: a middle of the road ballad, that has its nice moments - especially and the end of the chorus, but nothing more. Bit boring at times, I'd say. And I've heard a couple of versions of this song in various NFs in the last two to five years. It's not bad, but - kill me
@Looren - this is the weakest entry for me so far.