The HTML wizardry on show is insane. The game was built without a game engine and is so feature full and made with love it's absolutely insane.
So I like to write these things by getting the bad stuff outta the way first so let's do just that. The battle system honestly makes no sense to me at all. It really just felt like "random bull**** go!" every turn of just throwing cards at the enemy and honestly it worked for 99% of the game and I felt pretty much indestructible. Sometimes though when I tried to draw a card it just disappeared or showed up in my deck the round later but still flipped over and all around lots of very messy card interactions that had me thinking "is this a bug or am I doing it wrong?". The battle system was not really fun at all and without any information on what the cards actually did other than figuring it out via trial and error it was pretty much just all over the place.
The art is fantastic from start to end. The cards look fantastic I especially loved the animated ones. The shop keeper looked great as did the background and UI but the characters and monsters were SO much larger scaled compared to everything else it really broke the cohesion of the game for me. There's some weird scaling all over the place such as the characters looking too thin/squished and most of the monsters just being tiny sprite that have been re-sized 10x. Regardless of all the scaling issues it didn't make much of a difference in my enjoyment of the game and I still thought it looked really cool throughout. Not to mention the number of different backgrounds and enemies!
The audio was absolutely fantastic the music throughout the game was great and so well done and fitting but then when I finished the game... what the hell was that song? Hahaha it had such a British sense of "F*** it we're done let's just put something stupid and fun in that we care about". I actually loved it, felt very Monty Python nonsensical and just fun.
The pacing of the game was fine until I got to the end boss when it totally kicked my *** and pulling constant bad cards without being able to heal kinda sucked. I wish I could just keep pulling cards if I had energy cos having 10 energy and then just wasting it all every turn cos I had no cards to play felt kinda crap.
Overall an insanely well done game built in sprite of the various game engines available these days and is a pure technical and artistic marvel. I wish I enjoyed the battle system more but honestly with everything else going on for the game it's still super fun and clearly made with a lot of love.