Hi vism3, you should be able to find an opponent before reaching 100 seconds. Did you find yourself many times in the situation of not finding any opponents?
This is a fun fast paced shooter game! It has levels not to hard and you have upgrades that help a lot, unlike other shooter games (and upgrade cost like 1000000 gold for just 1% better) I give this a 5/5
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I will balance them in next update, probably tomorrow.