Here's what's been added.

You can now enjoy playing seeded runs. Share insane seeds with your friends to enjoy playing on.

The results screen when you end a game has been revamped to show more statistics, alongside the run's seed.

There are now two new decks added to the game!
Ethereal Deck - Allows Ephemeral Blocks to be purchased from the shop, +2 base grid size
Cardboard Deck - +2 Consumable slots (for a total of 4), -1 base grid size

These will be unlocked after you beat Polar Deck. If you already beat Polar Deck, you should automatically unlock these upon starting the game.

4 new Challenge Decks have been added: Midas, Staircase, Drain, and Impermanence.

9 new tags have been added, which are unlocked from the start, allowing you to go collect them immediately during runs.

Multiple Geoblocks and Ephemeral blocks have been added to the game. These Include Geoblocks Q, C, and V, and Ephemeral blocks Laboratory and Pathogen.

New Passes have been added to the game, such as Divine Intervention, Life Insurance, and the Golden Medkit.

Three new bosses have been added to the game, with one being an Endless mode exclusive.

New music by Kingofslimes233 has been added to play during Challenge Deck runs. (Personally my favorite part of the update.)

Geiger Counter has been nerfed, breaking after 50 uses. The wording on some tags has been changed to be less ambiguous.

The overall gameplay has been overhauled, allowing for each run to be less luck dependent and more standardized. For example, the minimum number of tiles that are safe have been increased, alongside alert and clue tile appearance rates being increased. Boss lineups have also been revamped, changing when certain bosses may appear.

The Architect now requires 8 rather than 15 tiles, and has been moved to Act 3+

King of Slimes now will cover the screen in "slime" after bomb detonations, alongside at the start of a round

The Coin has been moved to Act 2+

The Taxman and The Glass has been moved to Act 1+

The Librarian has been completely reworked, now disabling all but one of your tags, changing which one is enabled every time a tile has been cleared.

Fixed Cultists not working properly

Fixed The Surgeon having more than one tile safe when the grid size has been altered through tags/passes

Fixed most screen flickering

Fixed the strange board rearrangement that would sometimes happen when clicking on the first tile of a round.