Heyo, i just tried this game on the computer i told you. It works very well ! It slows down in bigger areas but that's entirely my computer's fault.
This is a work of love and it shows. Everything is very intentional and from the very second you start the game, you know what you're getting into. I've got a Windows XP 2000 indie game vibe. Both in a good, and in a bad way.
The games created back then were from passionate developers doing their thing in their own corner and sharing their work with the world when they wanted to. That's waht you're doing too. I can see myself spending some time in this world you crafted, vibing to the fantastic music -it is fantastic!- and letting my eyes wander onto your lovingly crafted sprites. Keep doing your thing, you're doing it wonderfully! All in all, my short experience so far was that of an "hommage" to an area of older platformers which were more demanding of the player's time and skills.
One thing i didn't think would be of so much importance to me is the difficulty: your game is challenging, in many places even frustrating. The controls, ennemy and platform placement don't allow for much maneuvering and if you don't jump on that bird at its very peak altitude, you won't get further and fall to your death, instantly punished. This wouldn't be such a problem if, say, the screen was a little more zoomed in and i could see the pixels i am supposed to be bouncing off of, or if i could recover easily in the earlier levels. I don't mind a little challenge, but i felt most of the platforming was tedious precision jumping that made me squint at the screen, rather than enjoy the challenges i was put through. The jump/bounce/falling curve is really odd to me as i was expecting it to carry the momentum from going left to right but it seems to stop and slowly accelerate when you press the direction key, which makes most of the jumps unnatural, to me at least.
The way Bobo is controlled in your game -unfortunately, for me- is very "dated". The characters isn't very reactive, moves slowly, and jumps awkwardly. Combined with unforgiving platforming, it makes for tedious challenges that require discipline and precision, and that is not easy to enjoy for its own sake. In a way, this forces you to be fully focused onto the game, because you don't instantly get how to master Bobo right away.
Now, i think i'm trying to be critical of the mechanics of your game, but this is not what really matters here i feel, is it? I like your game, and i like that you're making it. I can enjoy the world you built and appreciate the time you put into it. In the end, i just don't think this is a game for me.