* Specifically optimized for Android devices, 
using ARM assembler to run at maximal possible speed.
* Full screen portrait mode emulation, 
with options for simulating scanlines and fuzzy display.
* Records soundtrack to MIDI files.
* Play with you physical keyboard, touch screen, or accelerometer.
* Save gameplay at any point and go back 
to that point once your character gets killed.
* Xperia Play special buttons supported.

* Backup memory and save state support, auto-save 
and ten manual slots for save states. 
State files from FCEUX should work on NES.emu and vice-versa.
* Supports ROM-based games in .nes and .unf formats, optionally in zip files
* Famicom Disk System emulation using .fds files (select your BIOS in the options first)
* VS UniSystem support, push Start to insert coins
* Uses FCEU-compatible cheat files (.cht extension) 
* Zapper/Gun support, touch screen to fire, touch & 
hold outside of display area to simulate firing away from the TV 
* Configurable on-screen multi-touch controls in addition to keyboard controls 
(needs Android 2.1+ for multi-touch, up to 3 touches supported at once), 
and an Xperia Play optimized button layout
* Multiplayer-capable Wiimote + Classic Controller, iControlPad, 
and Zeemote JS1 support (no need to purchase a separate app, 
see website for full instructions)