It may not be the most complex or expansive zone I have seen on the forum, but it is quite fun to play through and it really does feel like Seaside Hill. The aesthetic as well as the texturing is well done, the platforming is clean and lines up well, and the mechanics that are there work nicely. This zone (in comparison to your others) also indicates your knack in finding good spots for the emblems (since for starters I could not find all of them in quick succession).
The only critique is that out of all of the enemies, it would've been neat to at least see a reskin of the CEZ Egg Lancers (since they stick out amid the other two having custom sprites).
I'm glad you enjoyed the stage!