I really like the music and the mechanical, rusted feel of the 3D models, which contributed to the overall moody atmosphere of the game. The second boss in particular was especially well-animated, with the jerkiness of the movement and how it would slowly creep on screen, and it was a nice design element to include the sawblades on it. However, it felt a little unfair to fight because it could trap you with no way out, so I was stuck on it for a while before I realized the movement pattern was always the same. The fourth boss seems a bit glitchy at times, and I saw the HP jump from 0 to 81 or something like that when it changed forms, so it might be a good idea to add some indication that it's a second phase. I thought the orbiting mechanic could also use some work, since it was usually easier to fire the dianthus and focus on dodging, instead of positioning the crystal to overlap the orbit with the boss. Maybe it might be more effective if the orbiting speed was increased or you could hold the mouse button to draw them in closer. Overall, it's a solid experience and I genuinely enjoyed it. Good job.