Hello !
I just tested your game prototype and I think this game is quite good !
However, I have a lot of things to say about the game, because I have seen a few issues about this prototype.
First, the upgrade mechanic is fine, but it's sometimes not explicit about what we got after levelling up. We don't know if we truly have more speed or more attack range outside of the gameplay.
Next, there is an issue that if you choose 2 of the same level up, we won't actually level up. For example, I chose the "Sorcery Sphere", which gives me a Sphere that rotates around. But if I choose that same level up again, I thought that it will give me a second Sphere, but instead, nothing happens. Making that level up progress a waste :/
Finally, when we die, we go all the way back to the beginning of the game. No continues. In my opinion, this is quite unfair.
By the way, even though this gameplay-style isn't as original, I feel like this game may have some potential if you put more thoughts to it. In fact, I have a lot of ideas that may make your game not only a bit more unique, but also more interesting and enjoyable !
Anyways, I wish you good luck for your project and don't hesitate to contact me if you want ! :3
P.S. The music doesn't fit the gameplay objectively speaking, but subjectively, I think it is. ^^'