I enjoyed the demo, though I did want to bring up some stuff (I am playing on an Everdrive x7):
• I saw that below someone mentioned it took a while for them to figure out that jumping down a platform was Down + A, (which while it is a commonly used combo) for the full game something like a tutorial for the basic movement could be helpful as not everyone is as familiar.
• I want to echo the request to be able to shoot upwards. I understand if the game was built around only being able to shoot left and right, but it can be frustrating seeing an enemy above you and not being able to do anything about it.
• If it's possible, could you add a preview image for the Chameleon Circuit in the inventory? A minor nitpick for this one but it felt annoying having to press Start, change menu, scroll down, change suit color, exit out, look at my character, repeat.
• I noticed that jumping down a platform while moving left or right causes you to flying downwards really fast. Is this intentional? It certainly was surprising when I discovered this on accident.
• Final issue, my game doesn't save at all. I thought this was intentional after beating the demo but I decided to simply save and reload at an earlier point to see and it doesn't save at all for me.
I am very much looking forward to seeing where this game goes though!