I had fun playing this game! The art, sound, and music were all really great too! It felt very well put together. I really liked the diversity of mechanics at play, lot's of stuff to think about at once (e.g., ammo, fall speed, switching between light and dark, and so on). The game is very difficult, but at least to me that felt intentional, and it works nicely as you get better at it and get upgrades. It really makes you divide your attention a lot, which makes for a great challenge!
Here's some feedback if you expand on this more:
- It didn't seem like the restore health potion would be useful because of the checkpoints so I never took it. I am very glad there were checkpoints though and didn't need to rely on healing myself--I think at that point the game would have been too hard for me to get through.
- Some projectiles felt very hard to avoid, especially since they seem to go through other blocks. I guess it felt doubly hard if you were falling into them--they're moving fast and you might be falling fast. It is fun to try to dodge them by toggling the light/shadow, but usually that means I end up falling faster since the shots and floors usually match if the shots are coming from below you. It's tricky because the challenge of the game is fun, but I think this part felt slightly more frustrating for me. Maybe just a bit more tuning with some of that if you find more of this experience with more playtesting.
Overall, really great job! It's awesome how polished you made this!