diff --git a/Makefile b/Makefile
index 403f5c9..a97237f 100755
--- a/Makefile
+++ b/Makefile
@@ -5,10 +5,10 @@ all: build stat clean
 build:
 	rm -f muri-src.zip muri.zip src/muri.min.js
 	uglifyjs --compress --mangle --no-dead-code --output src/muri.min.js src/*.js
+	(cd src/assets/images; for i in `ls *.png`; do pngcrush -brute -reduce_palette -ow $$i; done)
 	(cd src && zip -q -9 ../muri.zip index.html muri.min.js assets/* assets/**/* vendor/*.min.js)
 	(cd src && zip -q -9 ../muri-src.zip ./* ./**/* ./**/**/* ../README)
 
-.ONESHELL:
 stat: build
 	@filesize=`stat --printf="%s" muri.zip` && \
 	echo $$filesize "byte ->" $$((100*$$filesize/13000)) "%"
@@ -16,4 +16,5 @@ stat: build
 clean:
 	rm -f src/muri.min.js muri.zip
 
+.ONESHELL:
 .PHONY: build stat clean all
diff --git a/src/assets/images/room_stasis.gif b/src/assets/images/room_stasis.gif
deleted file mode 100644
index b3c0a90..0000000
Binary files a/src/assets/images/room_stasis.gif and /dev/null differ
diff --git a/src/assets/images/room_stasis.png b/src/assets/images/room_stasis.png
new file mode 100644
index 0000000..c5190d2
Binary files /dev/null and b/src/assets/images/room_stasis.png differ
diff --git a/src/assets/images/room_stasis_dark.gif b/src/assets/images/room_stasis_dark.gif
deleted file mode 100644
index 61d9d09..0000000
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diff --git a/src/assets/images/room_stasis_dark.png b/src/assets/images/room_stasis_dark.png
new file mode 100644
index 0000000..a10fde8
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diff --git a/src/assets/images/stasis_doorSheet.png b/src/assets/images/stasis_doorSheet.png
index c97ef2a..2c6a83b 100644
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diff --git a/src/assets/images/stasis_lightSwitch.gif b/src/assets/images/stasis_lightSwitch.gif
deleted file mode 100644
index 16c551e..0000000
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diff --git a/src/assets/images/stasis_lightSwitch.png b/src/assets/images/stasis_lightSwitch.png
new file mode 100644
index 0000000..bf35a73
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