I gave the game a solid crack, and visually the game was pretty solid, but I am unsure which assets were produced by you and which were downloaded externally. In terms of gameplay, it was a cool concept! I can imagine it becoming a very clean mechanic if you expanded on it, so well done on that front!
The fire theme was a bit of a stretch for me and in terms of multi use, I feel like just applying that term to mana means you can practically make any game fit that theme so it didn't feel like the most creative use compared to some other projects
All in all, we could definitely see areas that would've taken a lot of effort from a solo team, so that in itself is something to be proud of!