I like it
Good
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-Nice game
-I liked leveling up
-to have some things unbreakable (the red rock)
-nice graphic
-nice ripple effects
Bad
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-When I went to refinished stage 2 with nearly full exp to level 8, I ended up leveling up at the start of stage 3
-When leveled up to the additional level 9, you should eliminate the experience bar, or make more upgrades, which I find is plenty.
-The nice ripple effects slows down the game a little, maybe have an image quality changing button.
Uncertain
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BEFORE READING, IF THERE WAS A BLACK DRILL AT LEVEL 8 THEN NEVER MIND
-I think that when I leveled up to level 9 the drill became black from white (or not), but when I died at the same stage I became level 9, I redid the stage and started of with a black drill with the level 8 upgrade.