Loved the boss fight at the end in particular but there are loads of great touches in this. The graphics are superb - got me thinking of the first scene in Indiana Jones (with the big rock). There's some obvious unfinished parts in the levels (I fell down a hole in the floor and was stuck and had to wait until I died to restart). Also, the enemies before the boss are a tad too easy.
Add some cool level design and varied enemies and this could be great. Oh and the 'Aztec' speech was very well done at the end.