Hi there! I understand you're having trouble purchasing buildings with your coins in Pearl's Peril. Let's see if we can figure out what's going on together.

To start, could you please tell me:
- Are your coins actually being deducted when you try to buy a building, but the building doesn't appear?
- Or do you not have enough coins showing, even though you think you should?
- Also, are you seeing any error messages or is the purchase option just not working?

This info will help me pinpoint the problem.

Meanwhile, here are some common steps you can try:
1. Check your coin balance: Make sure you have enough coins to buy the building. Coins are earned from your current buildings or gameplay.
2. Restart the game: Sometimes a quick restart clears temporary glitches.
3. Ensure materials availability: Some buildings require not only coins but also specific materials to be constructed. Verify you have those items.
4. Verify your internet connection: A stable connection helps the game sync purchases properly.
5. Clear browser cache: Since you’re using WebKit on Windows, clearing your browser’s cache and cookies can help if data isn't refreshing properly.

If you've tried these or if the problem persists, let me know what happened. Also, if you recently purchased coins and they don't appear correctly, it's a good idea to check any receipts and contact support with proof for help.

Let me know what you've tried and any additional details, and I'll guide you through the next steps!