Alright, I took a shot at your game. The basic premise seems good; reminds me of Knights of Pen and Paper on Steam. You have four characters, each with distinctive abilities and personality that you need to utilize in order to solve the puzzle rooms you encounter. You have the Knight, John, who applies a shield, or a barrier, that blocks any incoming projectiles. This is mainly used to safeguard others. Then, you have the Berserker, Shemri. She can jump over 1-square obstacles and voids. You also have the mage, Cherry. She can blast most enemies (and your party members too, if you're feeling evil) away with a single shot. Some enemies are immune to this. Also, her fireballs can trigger switches if nothing else is on the way. Then, you have the Bard, Aubrey. His ability is the one you'll probably end up utilizing the most. His musical notes that he shoots switch placements between Aubrey and anyone they hit.
The puzzles start off as easy, but quickly become progressively more difficult. Most of them are genuinely intelligent. I wasn't too keen on the jumping puzzles later on, read more on that below.
The game shows some real promise, but a few things I feel like I should comment on. For starters, maybe you had a tutorial of sorts ingame, but if so, it was hidden well enough that I did not encounter it. I almost stopped on the first puzzle that required jumping as I did not realize (at that point) that the characters had distinctive abilities. Also, the special abilities are triggered via Shift, which introduces another problem: Windows' default behaviour is that when you rapidly press Shift multiple times in quick succession, you get this annoying pop-up that asks whether or not you want to utilize the StickyKeys feature. This in itself might not propose an issue, but since many puzzles require a lot of jumping (done via Shift), the popup was constanly interrupting my game play. When paired with the fact that some of the puzzles required rather exact timing on their jumps (Stages 10 and 12 come to mind) I had no other choice but to exit the game. If you somehow manage to fix this in future versions of the game, let me know and I'll play it again.
Notice: I played the updated version linked on the main game page, as the author is aware the version linked above is broken.