Les

FM-1 firmware · v745

RAMBEAVER

A side-scrolling action game: a beaver defends his dam, rides through a robot city and battles robots, with its own song.

Made by
Adam Wilson
Released
October 17, 2026
Install
On GitHub
Scan
Scanned, nothing harmful found · Oct 31 What we checked
Last checked
October 31, 2026

What RAMBEAVER does

  • RAMBEAVER turns the FM-1 into a side-scrolling action game across a dam, a robot city and a data center.
  • The eight numbered keys are the controls: left hand moves and opens doors, right hand acts.
  • Lower keys 1 and 2 move, 3 ducks or drops through thin platforms, 4 jumps and 5 fires.
  • Upper keys open doors when lit, call a posse that clears visible robots, and throw molotov bottles.
  • Bike and jetpack sections move you forward, with ramps to launch from and hold Jump to rise.
  • MASTER sets overall volume, and Music Off keeps the character voices and effects playing.
  • Live saves queue until Pause or death, so wait for PROGRESS SAVED before switching off.
  • Follow the FM-1 in Chrome and use Record then Stop & Export to save video with USB audio to the Desktop.

Its modes

Menu
Open it with PLAY / STOP to pick New Run, Continue or Music Off using SELECT and SEL.
New Run
Start the game over from the beginning.
Pause
Freeze play with PLAY / STOP and SELECT / SEL, check flawless status, and let queued saves write.
Music Off
Silence the music while keeping character voices and sound effects.
Continue
Load your saved progress and carry on from there.

What Les checked

RAMBEAVER v745Scanned October 31, 2026

What we checked for

  • The file is exactly the one its author published
  • It's the same file we saw when this release first came out
  • It opens cleanly as an FM-1 firmware, nothing damaged
  • It doesn't show up on your computer as a keyboard, mouse or other input device
  • It doesn't show up as a USB drive or network adapter
  • Its text mentions no computer command tools, like PowerShell, Terminal or a download command

What we found

  • MIDI and audio, as expected

StatusScanned, nothing harmful found

Les scans every firmware here whose file is public, and shows what it checked and what it found. A scan lowers the risk; it can't rule it out. This firmware is made by its author, not by Les or M-VAVE. Back up first, and install at your own risk. How Les scans firmware

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