Great use of the theme! This is a really fun concept, with a nice range of upgrades and enemies and a really strong, and everything ties in perfectly with the virus-fighting nanobot framing
The tank controls were a little tricky for me to get the hang of, and made it quite hard to dodge incoming attacks when in cell mode - possibly a skill issue for me as I tended to panic about getting to the nearest infected cell rather than making sure to collect upgrades first!