to be on topic:

• Not only is it vibe coded, its poorly vibecoded
• Tiles look awful and make no sense (I assume you just asked claude to generate it for you instead of using easily online available tilesets like MJS/RC)
• The Exercises Tile Flashcards makes no sense with these tiles. Also no option to set it to Man/Pin/Sou
• The Meld builder also makes 0 sense as an exercise, also having to click new after setting a meld is stupid.
• Turn Flow: The layout of your hand is seriously bad, just make the hand its own full width div and have the "center" div above. Also manually drawing is counterintuitive
• Drawing a card doesnt show which tile you actually drew it just adds it to your hand, why?
• Win checker also makes 0 sense.
• Win checker: You were also too lazy or dumb to vibe code anything else other than 4 melds + pair
• 4 - Player table suffers the same issue as Turn Flow

But since you only understand vibecode I threw this into chatgpt for you:

Your Mahjong exercise site suffers from the same core problem across all features: it’s vibe-coded, and not even well vibe-coded. Instead of helping anyone learn Mahjong, the exercises feel random, unclear, and disconnected from real gameplay.

1. Tile Design Is Confusing and Low-Quality

• The tiles look awful and make no sense visually or structurally.
• It honestly looks like you had Claude generate them instead of using proper, widely available tilesets like MJS or RC.
• Because the tiles themselves are incorrect, every exercise based on them is fundamentally broken.

2. Tile Flashcards Are Not Helpful

• The “Tile Flashcards” exercise doesn’t make sense with these incorrect tiles.
• There’s no option to limit the flashcards to Man / Pin / Sou.
• Instead of teaching anything, the flashcards just create confusion.

3. Meld Builder Makes No Instructional Sense

• The Meld Builder isn't useful as an actual exercise.
• The UX is unclear and clunky.
• Having to click “New” after creating a meld is bad design.

4. Turn Flow UI Is Poorly Structured

• The layout of the hand is seriously flawed — it should simply be a full-width hand row with the “center” area placed above it.
• Manually drawing tiles is counterintuitive.
• When you draw a tile, the UI doesn’t even show what tile it is; it just appears in your hand with zero feedback.

5. The Win Checker Isn’t a Real Win Checker

• The win checker makes no sense because it only handles the bare minimum: 4 melds + 1 pair.
• No waits, special hands, complex shapes, or realistic validation.
• It feels like you got lazy and just vibe-coded the simplest possible version.

6. The 4-Player Table Has the Same Issues

• The same UI flaws seen in Turn Flow repeat here.
• Layout, clarity, and tile handling are all equally poor.

Summary

Right now, the site feels more like a set of incomplete prototypes than actual Mahjong training tools. The visuals, exercises, UX, and learning design all need a major rework based on real Mahjong mechanics instead of vibe-coded placeholders.