For anyone else playing the web version:
- Accuracy is device dependent: playing on my old tablet (Firefox for Android) the accuracy goes way down relative to playing on my desktop (Firefox for Linux).
- Also on the tablet, accuracy suffers while fast-forward is turned on. Maybe 30-50% of shots that land squarely fail to register. In combination with the accuracy difference, it's very possible to lose in the first 1-3 turns.
- Multicast doesn't appear to do anything, even with 100% multicast chance.
- Ice slow is far, far weaker than the description states.
The game is still beatable (at least on my desktop) if you're careful to avoid dud upgrades like the above, as well as Life Steal, Assassin, and Armor Shredding. Taking a bad upgrade is worse than missing out on a good upgrade, because it also worsens your future picks by putting clutter into the rotation. (Lifesteal would be fine if it capped at 15%/15%, it's removing the offensive upgrades that kills you.) (Armor Shredding is extremely good post level 60, it just doesn't help during the main game.)