HyperDot

This one can be done with a little time and patience. Go to the level creator. In properties, there is a Modifiers setting. Go to Arena and turn power ups on with the rate of high. Feel free to increase the time if desired back on the main menu properties (above the Modifiers option) and then test the level. I believe (still testing) this will work towards the Traveller and Just a Learning Experience achievements as well.
Happy farming!

Guide for people wishing to knock this out quickly:
Go single player, Freeplay, Hover over classic and hit X for modifiers, Arena, Power ups on and rate high, Start game and just collect power ups until you die then restart.

Will take 20 mins max and no need to mess about making levels

Select Single Player > Campaign

Play through a couple of the levels until you unlock column 'F' on the levels.

Level 26: Breakthrough is a 'collect' style level with 'power up rate' preset at high.

There are two types of token in this level. The token that counts towards the achievement in this level is the purple circle with the rectangle inside a dotted square. (The blue token counts towards level completion, but not for this achievement).

It is possible to get 10 - 20 power ups in one play on this level so your progress bar will climb very quickly.

Once you hit 300 the achievement will unlock.