1. Start your run
Continue as a guest for a quick game, or sign in to keep progress, coins, and streaks across supported devices.
Rules + beginner strategy
How to Play LetterFuse
LetterFuse is a fast neon word puzzle: turn the letters you have into valid words, fuse them for points, and keep the board from closing in. This quick guide gets you from first move to a smarter streak.
2. Build a word
Look for a clean path through the available letters. Start with a word you know is valid instead of waiting for one perfect move.
3. Fuse and score
Submit your word to fuse the letters and add to your score. Longer or stronger plays can help, but board control matters more than showing off.
4. Watch the danger meter
The board gets harder when pressure builds. Treat the danger meter as a decision signal: clear trouble early rather than rescuing a run too late.
Beginner strategy that actually helps
Bank reliable wordsThree- and four-letter words keep momentum alive when the board is awkward.
Save flexible lettersCommon vowels and letters such as R, S, T, L, and N give your next turn more options.
Use power-ups with purposeSpend one to protect a promising streak or escape real danger—not just because it is available.
Your first five-move plan
- Make the easiest valid word you can see.
- Scan the remaining letters for a common ending such as -S, -ED, or -ING.
- Keep at least one vowel available when possible.
- Check the danger meter before chasing a longer word.
- Finish the run, note what trapped you, and play one more game with that lesson.
Quick answers
Is LetterFuse free to play?
Yes. You can play the browser version free and install the Android app from Google Play. Optional in-game purchases may be available in the app.
Do I need an account?
No. You can continue as a guest. Signing in is useful when you want to keep supported progress, coins, and streaks across devices.
What should I do when I cannot see a long word?
Play a shorter valid word. A reliable three- or four-letter move is usually better than freezing while the board pressure grows.
How do I improve my score?
Build consistency first: preserve useful letters, respond to the danger meter early, and use power-ups to extend strong runs. Better scores follow better board control.
Ready to fuse your first word?
Try a free browser run now, then take your streak with you on Android.