Just finished game - totally agree with SaltSquared comment. Holding space bar seems like a good key to contract forces, and you could even introduce some narrow passages where this was a requirement. Another key could be used for special weapon, because that is used so much less frequently. I think this would really change the dynamic of the game and make it a 5-star game instead!
Agreed regarding comments. This should have not qualified for Badge of the Day. This is not a fun game. Suggestions for improvements based on other games in this genre are upgrades to the ramp (e.g., angle, length, friction, etc.)
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