I REALLY liked the art in this one. Pretty background and nice stagecoach.
The first stage song seemed a bit generic, but the second one really shined. I felt it captured the idea of a haunted wild west ride. The upgraded shotguns could use a different, louder bang to convey their power!
Super charming visuals, really enjoyed it.
It took me a while to understand the ride moved with the shotgun kick. I felt it was part of the game that it moved a little bit during the stage. The big ghosts added quite a challenge, especially in the first stage when I realized I had to shoot back to move forward. Managed to finish in my first try but I was always on the edge since I had only one heart after the first stage. To me the challenge seemed fine tuned enough, well done!
I liked the upgrades (the shotgun upgrade seemed a bit overpowered!) and really wanted it to last more than 2 stages. Only thing I'd argue is that the stage ending seems too sudden. I wasn't paying attention to the stage length indicator and then it just seemed to show me an upgrade, while at the second stage it just ended out of nowhere. Perhaps a slower screen dimming and some sort of victory fanfare could help?
Anyway, really neat game you got there, kudos!