You've seen the demo at C3 and you could download it.
Now you can download and play the demo version. It's a .bps file. Use Flips. I'm not sure if I can update this, as University is in the way. And speaking of the next C3, you should check it. I'll have a surprise. If you want more screens, check the link below: Click me
I'll get to this. Not sure if I'll have the custom music removed due to the things you mentioned in the PM. I'll see. I'll post the fixes here:
- every item memory issue you mentioned regarding level 1-1 was fixed;
- every item memory issue you mentioned regarding level 1-2 was fixed;
- the item memory issue you mentioned regarding level 1-3 finally fixed and replaced the existing winged cloud with a hidden one that should be in a safe spot;
- the 1-1 warp was fixed for the next demo;
- added stones in the location you mentioned.
Bonus: While I'm at it, I'll start to work on level 2-2.
Edit: I did have a backup.
Minor Item Memory issue here. It's possible to collect a normal coin and despawn the Red Coin. While this is not that serious as the player essentially has to go out of their way to cause this, it is still something you should consider fixing.