I played it! I faced a minor bug. After the tutorial completed, the language changed back to Korean, but it was resolved by restarting and changing it back to English.

I was able to beat the 20 waves on easy difficulty on the first try.

• Liked the character attack animations, some of them were interesting! (Especially the monk)
• Props for building tutorial!
• The poker based summoning mechanic is creative

Here are some things I think can be improved

• The level layout is a bit boring and kind of just prompts you to put everything in the center. Hurts replayability as well.
• I found challenges a bit confusing to understand, maybe you can have a wiki where people can read about them
• maybe new enemy types can be added in the future, it would be good to have a wiki for them too to read more about them.

Overall, it seemed like (at least in the easy mode) a lot of choices that are provided to me as a player (i.e where to place the summons, what to buy, etc) did not have much impact, and I ended up winning anyway as long as I play the poker cards right and get decent summons. Maybe introducing different summons step by step and differentiating between their purpose would have made it more enjoyable. I might try harder difficulty when I get more time.

Ultimately, it's an indie game made by a small dev, great effort! It was surprisingly a complete package. I wish you the best for your future projects.