I love the game
Your characters are so lovely and hilarious, was super fun definitely stroked that metroid vibe and a bit of cave story too!
After weeks, I've finally been able to beat it! I have all the medals except 3, I did notice the weird flying things in a hidden area in the wall, and I have no idea what to do with them, but I thoroughly enjoyed it until the last text box scrolled. (No, I don't mean I hated the ending.)
So a lot of these medals don't work. I got all the birds free, found and helped all the survivors, finish the game 100%, but I got none of the medals. I also didn't get a medal for defeating Nerk-Nerk or the Orb.