Thanks a lot. To your points I might have went overboard with the effects on the arena, there is a point where the clock starts spinning but then I thought - ow lets also rotate the arena randomly every wave, so we actually always start from 12 but 12 is not always at the top.
Meta progression was a little better for the scope of the game right now but if I were to progress further with the idea and add even more content on top, put a proper story behind I'd keep meta and add roguelike on top (kind of like Hades, with the mirror).
Everything aside, appreciate the feedback!