Really fun! It took me... too long to realize I could hold down the mouse button. I really like the idea of having multiple blocks that count down in different ways that you have to manage. I thought the timed one was particularly interesting. One point of feedback, I often found myself just spamming clicks at the lowest blocks rather than being strategic about tackling different classes of blocks in any particular order. If you were to expand on this idea further, it might be worth introducing elements that force the players attention away from the most obviously urgent blocks. I think the timed blocks, the exploding ones, and the healing ones are great examples of that! For such a simple concept, it was a very enjoyable experience. Great work!