The game is very fun so far! However, I do have a few issues.
I think the tutorial is a little bit confusing at times. Perhaps tutorial 3 should be before tutorial 2, so users can get a bit more of an explanation for how combos work before the timed level. Also, I think some of the tutorial cards are a bit too wordy, like the one explaining the keyboard camera controls. I would guess that users are familiar with the concept of needing to move the camera to see better, so I think you should just explain the controls and leave it at that. In tutorial 2, an additional information card comes up after you place the first disaster, but I didn't even notice it at first because I was trying to get a good time. I think this issue would be solved by switching tutorial 2 and 3, and omitting the second card from the timed tutorial level.
Additionally, it seems like the option to choose between inverted and non-inverted camera controls is not working. I would also prefer it if the mouse camera control was the right mouse button instead of the middle mouse button, but that could just be a personal preference. I think middle mouse button would be better suited for cancelling disasters.
Overall I love the concept for this game, and I had a lot of fun playing the tutorials and first level, experimenting with different disaster combos. I would love to see more disasters and more levels! Great job so far, especially with the game's artwork!