Had a lot of fun with this one, and I felt like the progression was pretty good. The cost of different upgrades had a pretty consistent per-purchase-increase. The game systems were also interesting, from being able to hire companions to resetting your progress for special perks. Fast mode was also very appreciated since it sped things up quite a lot once damage output got to a certain level. I got a bit confused at around 10 T though, since I didn't know you could reset the dimensions, and things started to slow down quite a lot, but I figured it out pretty quickly.

Some things to point out:

• The game starts right away and there's no way to pause as far as I know, so it's a bit stressful to get flung right into the thick of things. 
• Special perks were an interesting concept, but I never felt brave enough to try any of them since they reset your progress, and it didn't say *how* significant the upgrades were.
• At some point, it wasn't worth clicking on enemies since they just died instantly anyway, especially with fast mode enabled. It would be nice to have some late-game mechanics that would justify actually clicking on the enemies.
• Some sound effects other than just music would have been nice.

Overall, though, this was a great submission! Also liked the aesthetic choice of using different combinations of letters to represent exponents. At the time of this review, I have reached 10 ZZ currency.