Put this on my Saroo and tried it first on my UK/PAL Saturn: pleased to report that it all seems to work very smoothly.
For a solo, homebrew project, this is phenomenal. The HUD is well-designed, particularly in that it switches side depending on which character is in play. However... what was behind the decision to reinvent the wheel on the controls?
FPS games habitually to use the D-pad for forward, backward and turn, with the shoulder buttons to strafe and one of the other buttons (usually A) to fire. Even with the on-screen prompt to use A/B to turn, I constantly found myself turning when I wanted to shoot and shooting when I wanted to turn, just because the more traditional controls are ingrained.
My only other gripe would be that it's difficult to tell where I'm aiming sometimes. This might improve with more play, but there were times where I was convinced I was lined up with my target, but used all my bullets to no effect.
Even so, this is a fantastic achievement, and I look forward to future Playnautic games!