The x-mas trees are gone, but there are new, better, curvy trees. They come with an associated upgrade that lets you increase the duration of their positive effects.
There are also destructible rocks in the levels now. Who knows what you might find under them?
In addition to that, there are 5 new ablities and an upgrade to unlock a third ability slot enabled in the demo, making a lot more builds viable.
In addition to that, I tweaked the difficulty of the beginning of a run. There are not a few more easier enemies and they drop more XP. So you should be able to level up more consistently.
Other changes:
Added an option to turn the single-fire abilities into auto-fire abilities.
Added an option to toggle instead of hold for firing abilities.
Linux build for itch.
Increased web-build default viewport height from 720 to 800.
Enemies should get stuck less often.