A fun little puzzler! Great job! I didn't really understand that different colored tasks could be stacked in the same time slot, so I was accumulating tasks too quickly at first. I figured it out though and enjoyed my time with the game. Would be nice to see more diverse iconography for the task requirements i.e. a number instead of a star when a task must be in a specific slot (the tiny white text describing task conditions isn't very legible). Also, it seems that I fail the run whenever I do my last task on Saturday even though it should just be overtime before the deadline? There doesn't seem to be a distinction between fail conditions on the end screen.
I also didn't understand this right away, but this is amazing! Loving this. <3
One thing I was having issues with too was I was dragging a 2-slot block down into the bottom, and it kept snapping back into the grid.
It would be a nice UX enhancement that if I pulled a card to the very last slot, it would fill the slot above it if it's 2-slots. :) Just to make the interaction a little easier so it's not so precise.