At first I didn’t pay attention to the title, and assumed that you had to use your own seconds as ammo to reduce the ones on the other blob. The gameplay my imaginary version of your game resulted in, allowed me to go reasonably far into the actual game. – I like your idea better though.
It’s a bit hard to balance (ha) the accelerometer with the d-pad, and I think the blobs & ‘sec’s would stand out a bit better if the background was ‘grey’/dithered – bit neither is really that much of a problem honestly.
If I could change only one thing, I’d put the leftover time on the blobs.
If anything, this gives me an idea of what it must be like for anyone else to play one of my games.