I might have done something wrong, but I had some issues with the game (for example, no one was following me, even though in the resources and screenshot I see it should be Dracula; and at one point, the level auto-scroll froze and I couldn't move foward).
From what I saw in your comment, you used this project to improve your skills with SDL2, so it's not bad. In future projects, you can add more things to improve the experience, like more sound effects, so, good try. 👍
(This is a personal thing, but I got motion sickness with the camera. The auto-scrolling worked fine, but the level map moved a bit slowly, as if you moved the level manually backward instead of moving the camera forward. But I get motion sickness easily, so it might just be my problem.)