First thing that really stood out to me was the music. It reminds me a lot of the era of PS1 JRPGs and it's amazing.
The platforming is fine in most parts, though some of the repeated jumps with small platforms are a bit tough.
Upgrades are definitely a welcome addition though it feels like mana could regenerate faster. Most boss fights I end up out of mana potions just dodging attacks and waiting for it to regen.
Overall though I feel like it shows a ton of promise and has a very solid foundation.