I've seen worse...
...because I've not seen any better... The game is fun, at times challenging and you've apparently put quite a lot of thought into the gameplay systems and that stuff ;) Got 808878 points in arcade before I got tired of "digging" and running... The only thing I would like to be changed is the variety of enemies, because three types (plus boss) is a bit... boring after a while. But over all a very good game!