You probably can't ask for an increase of options in the existing grant (contract), only for a new grant. And since there's two developers you're effectively negotiating for the other person as well (even if you don't want to, the founder will claim employees should/will be treated equally).

Of course you personally can make money during an acquisition. If it's a cash acquisition there's now a buyer for your options, if it's a stock acquisition you'd now own stock in the new company (if you're lucky they're publicly traded so you have a market to sell your options to).

Is 0.2% the options you will have after the first year (with 3x0.2% more coming in the next years) or is 0.2% the total already?

How much salary would you say you're missing by working at that startup?