- Player-background collision test method changed
- Player and enemy bullet hitboxes adjusted
- Lifted the restriction to moving right
- [Arcade] Bonus life each 100,000 points
- Custom beeper sound module, used on machines lacking an AY chip
- Fixed AY music channels playing out of sync under certain conditions
- Fixed the AY effect routine replaying an old sound effect after respawn
- 48K+AY effects support
- Fixed shimmering background artefacts on levels 3, 4
- Added Pentagon timings option, .TRD version only
- Other minor fixes
20170616
- Changed Sinclair 12345 to Sinclair 67890 (via Slider)
20170622
- Fixed hanging when firing the lasers close to the right edge of the screen (via AER)