Fun, needs enhancements – Number Chain - Logic Puzzle Review

Fun at the Normal level, challenging at the Hard level as it should be. Would like to see the following enhancements: Option to undo just the last move. The eraser button is awkward at best. Option to turn off the sound effects, especially the “cheering” following a win. Option to replay the same puzzle.
Review by Yrjaens on Number Chain - Logic Puzzle.