Nice game! Held out for 15 minutes, scoring 37303 with the laser, everything fully upgraded, then I quit. I think I entered 'infinite mode', could probably go on forever, but I've had enough :-)
Thank you! And thanks for the feedback, I will make sure to patch it.
Patch it how? Ramping up the difficulty you mean?
Exactly, I will probably make the “blast zone” (the big red explosion circles) more of a threat and adjust weapon damage to enemy health.