Tips page now pulls from my knowledge base
Revamped the Tips page to merge local code tips with articles from my GitHub knowledge base — search, source toggle, and tag filtering all in one place.
I'm Larry (Danna) Collins Jr.
Software developer (C#, SQL, .NET). Live bluegrass musician. Vintage computer collector. I build things that are useful, play things that are loud, and collect things that are old.
Featured tools
Sudoku
Classic 9×9 Sudoku with five difficulty levels, five visual themes, pencil-mark notes, and a hint counter. Mobile-friendly, works offline.
Play nowDice Games
Multiplayer Yacht and Farkle in the browser. Host a session, share a QR code, and play from any device in real time.
Play now6502 Debugger
Write 6502 assembly in the browser and watch it run. Full assembler, step execution, live registers and flags, hex memory inspector. C64 compatible.
Open DebuggerRecent posts
All posts →Built a Sudoku game — five themes, hint tracking, mobile-first
Added a fully offline Sudoku game with five difficulty levels, five hand-crafted visual themes with textures, pencil-mark notes mode, and a hint counter that carries through to the win screen.
Building a Multiplayer Game System: Yacht and Farkle
How I built a real-time multiplayer game platform in the browser — QR-code lobby, shared game table, mobile player views, and PartyKit for live sync. Starting with Yacht and Farkle.
Tools
Interactive web demos I use myself. SQL helpers, regex testers, games, and more.
Tips
Pro tips in C#, SQL, JavaScript, and 6502 assembly. Stack Overflow-style, searchable by tag.
Vintage
My Commodore 64 and vintage computer collection. Hardware history, personal notes, growing 6502 projects.
Music
Live bluegrass with friends. AI-assisted songwriting with Suno. Videos and tracks.