Needs tweaking.

Cant get upgrades while playing arcade mode which means you either cant possibly succeed OR you just have to play over and over until you save enough to buy your upgrades. Mind you there is no way to play without them.
Also puzzle mode offers just one solution you must discover for each level even thought there are CLEARLY other ways.

Try bubble princess or monsters ate my condo, for better puzzle games.

Rinshi about Virus Laboratory, v1.5.0