Quite fun and nicely polished! I like how tense things are at the last level! I also like how if you lose you don't go back to level 1.
Unfortunately I had some issues with the web embed. It seems the game window doesn't rescale until the window is refreshed, and even then it's anchored in the bottom-left corner. This also affects the cursor coordinate when playing the game unfortunately. If I were you I change the embed option to 'Embed in page' instead of 'Click to launch in fullscreen'.
