Repulze in its current state is well worth the asking price, its wipeout for iPad. The polarity system adds depth that you learn to appreciate. You need to use it to speed up and sometimes slow down early on. I would gladly pay for Phase 4 or at least more content. I think $1 for 2 tracks is a reasonable price and I would pay for all of it. I would love to give the developer more money through the in-app-purchases but I feel it would encourage more of that behavior in freemium gaming.
sl123000 about Repulze