This was such a unique game. I loved the move mechanics and the concept of traveling back and forth in time as a cowboy and a biker. The art was simple and sweet and you had such a surprising amount of npcs. They really filled out the towns and gave life to it. I really dug that. I like the music, although it would have been cool to have this spaghetti western music when on horseback and biker rock when on the motorcycle, but that not really something I'd count against you.
I'm not sure if I beat the game or not. I got the double jump and the homing missiles and beat the boss on top of the alien ship. It said victory and i went back and forth trying to see if there was something I miseed. If I did beat it, it would have been nice to have a clear sign that the game was over. If I didnt beat it, let me know and give me a tip on where I should investigate next.
Dynamic NPC dialogue would have been cool to have. Stuff that updates after you've hit goal points. Like after I destroyed the boulder, the soldiers were still complaining about it. But that's also a pretty big task considering how many npcs you have in your game. In my game, I couldn't even get around to updating the mayor's dialogue each time you rescued a villager.
From what I played, I definitely enjoyed everything about it. Congratulations on a very unique take. I really enjoyed it!