Just finished Oracle of Seasons this afternoon! I forgot some of the items that were in this game that had changed mobility: the pegasus seeds for quicker movement, roc's feather/cape for the jumping and the magnetic gloves for pulling/pushing yourself towards/away from magnetic objects. A lot of the game and dungeons were neat and fun but I did have two issues that seemed to be apart of each dungeon: The shift in perspective areas where instead of it being top-down 2D, the rooms were from-the-side 2D and these rooms typically involved jumping which felt very janky and frustrating (and almost made me quit in the 8th dungeon where it was also icy floors/blocks you had to jump on) and how some rooms were only traversable via minecarts (which limited movement through the dungeon). I didn't mind the minecarts too much, but they did seem a little overused and forced in places. I had forgotten the game had gotten rid of bow and arrows and instead used seeds with a slingshot as a replacement. Each seed (Ember, Scent, Mystery, Pegasus and Gale) had different effects and were required to beat some bosses. The 8th dungeon gave an upgrade, which made you use the slingshot like a shotgun (3 seeds shot at once in a cone) which was hella cool. The final boss was OK, my main issue being that it was in one of those weird from-the-side 2D rooms that I already disliked. Otherwise it was a decent fight.
I recall having seen a video covering the Oracle games a few years ago, where the games were meant to oppose each other where Seasons was more combat-challenging and Ages was more puzzle-challenging. While some of the bosses had some difficulty; as a whole they weren't too bad. The biggest challenge in Seasons for me was the 2D platform in those god awful rooms. :p
